Progesterone For Luteal Phase Support Research Articles

Additional Daily Intramuscular Progesterone for Luteal Phase Support does not Improve Live Birth Rates of Programmed Frozen-Thawed Embryo Transfer Cycles

This retrospective cohort study aims to investigate whether additional daily intramuscular progesterone (IMP) for luteal phase support improves live birth rates of programmed frozen-thawed embryo transfer (FET) cycles. The study was conducted at a tertiary level university hospital assisted reproductive technology (ART) center between January 2014 and Jan 2021. Six hundred four infertile patients with single-day 5-6 frozen-thawed blastocyst embryo transfer were enrolled in the study. All patients received either 8% micronized vaginal gel or vaginal progesterone capsules for luteal phase support. Intramuscular progesterone was added to vaginal progesterone depending on the in vitro fertilization (IVF) specialist’s choice. Luteal phase support (LPS) was started 6 days before transfer in frozen-thawed cycles and continued until the end of the first trimester. Cycles were compared depending on vaginal progesterone types (8% gel vs. capsule) and the presence of intramuscular progesterone. The primary outcome was the live birth rate. A total of 604 FET cycles were enrolled. Using 8% micronized progesterone or progesterone capsules did not change the live birth rates (24% vs. 25.9%). As the main result, intramuscular progesterone support with vaginal progesterone compared with only vaginal progesterone did not improve the live birth results (22% vs. 24%). In conclusion, this study demonstrated that routine IMP progesterone given in combination with vaginal progesterone does not improve ART outcomes. This combination may be beneficial in a selective population with a monitored luteal phase. Using any form of vaginal progesterone alone is adequate for LPS.

Vaginal Progesterone Gel versus Intramuscular Progesterone for Luteal Phase Support in Suboptimal Responders Undergoing Assisted Reproductive Cycles

Background: The purpose of this research is to compare the efficacy of 8% micronized vaginal progesterone gel (VAG) at 180 mg daily versus intramuscular progesterone (IMP) in oil at 100 mg daily for luteal phase support (LPS) after fresh single embryo transfer (SET) in Patient-Oriented Strategies Encompassing Individualized Oocyte Number (POSEIDON) Group 1b patients, and to ascertain whether the type of LPS predicts live birth in these patients. Methods: A total of 2420 assisted reproductive technology (ART) cycles performed in Ondokuz Mayıs University IVF Unit were analysed retrospectively. The data of POSEIDON Group 1b (unexpected suboptimal responders) who underwent antagonist in vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI) cycles were included. All patients were categorized into groups according to the form of LPS, specifically VAG and IMP. Pregnancy, clinical pregnancy rate (CPR), live birth rate (LBR), spontaneous abortion rate and predictors of live birth (age, infertility duration, body mass index (BMI), type of progesterone used for luteal support, serum day 3 estradiol, serum progesterone on the day of human coryonic gonadotrophin (HCG), total duration of induction, serum estradiol on the day of HCG, the total number of oocytes retrieved, number of mature oocytes obtained, average gonadotropin dose per day, total gonadotropin dose administered and total number of embryos retrieved) were analyzed. Results: There was no statistically significant difference between the micronized VAG and IMP groups in terms of age (31 (23–35) vs. 27 (23–35), p = 0.319). There were no statistically significant differences in pregnancy outcomes between the two groups concerning CPR per transfer (70.6% vs. 75.6%; p = 0.364), ongoing pregnancy per cycle (36.2% vs. 39.5%; p = 0.577), and LBR per cycle (34.4% vs. 36.1%; p = 0.785). The spontaneous abortion rates (36.2% vs. 36.8%; p = 0.921) were similar between VAG and IMP groups. The type of LPS did not emerge as a parameter predicting pregnancy (odds ratio (OR): 0.718, 95% confidence interval (95% CI): 0.652–1.313, p = 0.451), clinical pregnancy (OR: 0.598, 95% CI: 0.592–1.289, p = 0.562) and live birth (OR: 0.802, 95% CI: 0.661–1.202, p = 0.580). The logistic regression analysis aimed at assessing the influence of confounding factors, namely age, BMI, and duration of infertility on pregnancy rate, CPR and LBR, did not reveal statistically significant results (p > 0.05). Conclusions: VAG 180 mg daily provide similar pregnancy outcomes compared to 100 mg daily IMP in POSEIDON Group 1b patients undergoing antagonist fresh IVF/ICSI cycles.

Comparing the outcomes of in-vitro fertilization in patients receiving vaginal, subcutaneous, and intramuscular progesterone for luteal phase support: a three-armed randomized controlled trial

BackgroundThe optimal approach to luteal-phase support in infertility treatment remains a subject of debate. This study was conducted to investigate the clinical outcomes, side effects, and patient satisfaction associated with vaginal, subcutaneous, and intramuscular progesterone administration in infertile women undergoing Frozen Embryo Transfer (FET).MethodsThis three-armed randomized clinical trial assigned infertile patients eligible for FET to three progesterone treatment groups: vaginal suppositories (400 mg twice daily; n = 100), subcutaneous injections (25 mg daily; n = 102), and intramuscular injections (50 mg daily; n = 108). The primary outcomes were chemical and clinical pregnancy rates per embryo transfer cycle, with chemical pregnancy defined as beta-human chorionic gonadotropin levels > 50 IU/mL two weeks post-transfer and clinical pregnancy confirmed by ultrasound four weeks later. Exploratory outcomes included progesterone-related adverse effects and participant satisfaction, assessed via a Likert-scale survey 12 weeks post-transfer. Statistical analyses included Chi-square tests for categorical data, one-way analysis of variances, and Kruskal–Wallis tests for continuous data.ResultsThe intramuscular progesterone group had significantly higher chemical pregnancy rates compared to the vaginal and subcutaneous groups (41.7% vs. 26.0% and 27.5%, respectively; p = 0.026). Although the clinical pregnancy rate was also higher in the intramuscular group (32.4%) compared to the vaginal (23.0%) and subcutaneous groups (21.6%), this difference was not statistically significant (p = 0.148). Additionally, patient satisfaction was greater with vaginal and subcutaneous applications than with intramuscular injections (p < 0.001), likely due to a significantly higher incidence of side effects, such as pain and edema at the injection site, in the intramuscular group (p < 0.001).ConclusionsWe found that intramuscular progesterone resulted in higher chemical pregnancy rates than vaginal or subcutaneous routes, but this did not translate into higher clinical pregnancy rates. Despite its effectiveness, intramuscular administration was associated with more adverse effects and lower patient satisfaction. Future research should explore optimizing progesterone regimens to balance efficacy and patient comfort.Trial registrationThe trial protocol was registered on December 6, 2020, in the Iranian Registry of Clinical Trials (IRCT), a primary registry in the World Health Organization (WHO) Registry Network, under the registration number IRCT20141217020351N12.

Impact of overweight and obesity on live birth rate in single euploid frozen embryo transfers: the key is in the preparation protocol!

Research questionDoes endometrial preparation using a natural cycle (NC) lead to higher live birth rates (LBR) in single euploid frozen embryo transfers (seFET) compared to programmed cycles (PC), for women across normal, overweight, and obese body mass index (BMI) categories? DesignRetrospective study of 845 seFETs. Patients were stratified by BMI into 3 categories (Normal weight, Overweight, and Obesity Class I/II). Outcome was LBR. ResultsA total of 845 seFET cycles of 688 couples were included in the analysis. After achieving covariate (female age, AMH, embryo quality and infertility type) balance in each stratum, the effective sample size was 481 and 262 for the PC and NC, respectively. The PC approach, in which patients received vaginal luteal phase support with 3×100 mg micronized vaginal progesterone (MVP)/day, were associated with significantly lower LBR in the weighted regression analysis of the cohort (RR: 0.80, 95%CI: 0.73 – 0.88, p<0.001), compared to the NC approach. The effect was significantly modified by BMI (P=0.003). While the effect was significant for all BMI categories, the reduction in live birth was less pronounced in patients with normal or overweight BMI (RR: 0.87, 95%CI: 0.78-0.97, p=0.014) compared to patients with class I/II obesity (RR: 0.61, 95%CI: 0.49-0.75, p<0.001). ConclusionA natural cycle endometrial preparation approach leads to overall better live birth rates in single euploid FET, and the most significant difference is observed in women with higher BMI. Furthermore, overweight / obese patients in a PC may require a higher dosage of progesterone for luteal phase support.

O-205 Dydrogesterone versus micronized vaginal progesterone for luteal phase support in hormone replacement therapy frozen embryo transfer cycles (REMODEL): an exploratory randomized controlled trial

Abstract Study question Is dydrogesterone (DYD) comparable to micronized vaginal progesterone (MVP) for luteal phase support (LPS) in hormone replacement therapy frozen embryo transfer (HRT-FET) cycles? Summary answer Ongoing pregnancy rates (OPR) at 12 weeks’ gestation were comparable between the study group using DYD and the control group using MVP. What is known already Thanks to vitrification, the number of frozen embryo transfer cycles has significantly increased, prompting for a thorough optimization. Few studies have prospectively compared different progesterone regimens in artificial frozen embryo transfer cycles. Currently, MVP is most commonly used for LPS in this setting, but side effects such as vaginal discharge cannot be neglected. Dydrogesterone, a selective progesterone receptor agonist with a high oral bioavailability, could be considered due to its more patient-friendly administration. Two randomized controlled trials confirmed the non-inferiority of dydrogesterone to MVP for LPS in fresh cycles, but robust data on its use in HRT-FET cycles remain limited. Study design, size, duration An exploratory randomized controlled trial was conducted at a university hospital from October 2021 to September 2023. Subjects were randomly allocated 1:1 to the study group using DYD (10mg three times daily) for LPS or the control group using MVP (2x200mg twice daily), all performing FET in a HRT cycle. The primary outcome was ongoing pregnancy rate at 12 weeks (OPR). Secondary objectives included biochemical pregnancy loss, early pregnancy loss (EPL) and live birth rate. Participants/materials, setting, methods Patients under 41 years of age with a normal BMI undergoing a single blastocyst transfer in a HRT-FET cycle without endometrial abnormalities were eligible for inclusion. Patients who required more than 14 days of estradiol valerate priming (2mg three times daily) to achieve an endometrial thickness of at least 7 mm were not included. Of the 170 patients screened, 19 did not meet the randomization criteria and 3 withdrew after randomization. Main results and the role of chance Demographic characteristics such as age, BMI, cause of infertility and regular cycle were comparable between the study and control groups, as were the frozen transfer cycle characteristics. With three drop-outs after randomization, both a per-protocol (PP) and an intention-to-treat (ITT) analysis were performed for the primary outcome. According to the PP analysis, the OPR was 31.5% in the study group and 45.3% in the control group (p = 0.08, difference in proportions (%) -14, 95% CI: -39-11). The ITT analysis showed similar results (OPR 31.1% versus 44.2% in the study and control groups, respectively, p = 0.10). Multivariate regression adjusting for age, BMI, endometrial thickness and parity showed no significant association between the type of LPS administered and OPR (OR 1.92, 95% CI 0.95-3.86, p = 0.07). Positive hCG rates were comparable between both groups (58.9% versus 61.3% in the study and control groups, p = 0.76). Differences in biochemical pregnancy loss (14.0% versus 2.2% in the study and control groups, respectively, p = 0.05) and EPL (32.6% versus 23.9% in the study and control groups, respectively, p = 0.37) did not reach statistical significance. The live birth rate did not differ significantly between the two groups (26.8% versus 41.9%, p = 0.06), but the delivery outcome of 3 patients is missing to date. Limitations, reasons for caution Despite the randomized nature of the study, the exploratory design warrants cautious interpretation of the results due to the primary outcome’s insufficient statistical power. The dosages of the LPS medication used are based on common clinical practice, but due to the absence of dose-finding studies, this may impact the results. Wider implications of the findings The results, although not statistically significant, may raise clinical implications and call for larger studies. A forthcoming analysis will assess progesterone levels throughout the cycle in these study patients, examining their impact on pregnancy outcomes. Given differences in pharmacological profiles, various dosages may also be explored. Trial registration number NCT04758871

P-449 Association of corpus luteum activity in early pregnancy and live birth after assisted reproductive technology (ART) and intrauterine insemination (IUI)

Abstract Study question What is the incidence of low corpus luteum activity in early pregnancy, and how are endogenous progesterone levels and live birth achievement associated? Summary answer Frequently occurring low corpus luteum activity (progesterone-level) in early pregnancy after ART and IUI strongly predicts pregnancy demise, though not independent of trophoblast activity (hCG-level). What is known already Ovarian stimulation and human chorion gonadotropine (hCG) administration may induce a luteal phase defect via negative feedback on the hypothalamic-pituitary-ovarian (HPO) axis. Luteal phase support (LPS) is routinely administered with bio-identical progesterone or oral dydrogesterone (DYD). DYD has high oral availability, minimal interaction with the pituitary gland, and no cross-reactivity in enzyme-linked immunosorbent assay (ELISA) with progesterone. Therefore, utilizing DYD as LPS in IVF/ICSI or ovulatory IUI cycles provides a unique perspective to assess endocrine luteal activity. While various studies explored progesterone and hCG post-IVF or IUI, none focused solely on the corpus luteum’s sole endocrine function and its outcomes. Study design, size, duration This single-center, retrospective study (with institutional review board approval) investigated hCG and progesterone serum levels after IVF/ICSI cycles or IUI cycles supported with DYD as the sole LPS. The study aims to assess their predictive value, individually and in combination, for sustaining pregnancy. Data from 189 IVF/ICSI and 198 IUI early pregnancies, respectively, with positive hCG test between January 2017 and June 2022, was extracted from the patient management system at the University Fertility Center. Participants/materials, setting, methods Included were only first IVF/ICSI and IUI treatment-cycles with serum hCG value ≥ limit of detection (0.6 IU/l) between days 9 and 16 after fresh embryo transfer or IUI, respectively. Additionally to hCG, endogenous progesterone was determined and the relationship between these and pregnancy maintenance was investigated using logistic regression analysis. Inclusion criteria encompassed hCG-triggered cycles using DYD as the sole LPS, administered at 30 and 20 mg daily for IVF/ICSI and IUI therapy, respectively. Main results and the role of chance The 10th, 25th, 50th and 75th quantiles of serum progesterone are at 0.28, 3.75, 33.0 and 98.7 µg/l in IVF/ICSI cycles and 0.48, 2.70, 18.40 and 26.6 µg/l in IUI cycles. Women in the first quartile of progesterone levels had nearly exclusively pregnancy demise: live birth rate 3/47 (7%, 95% confidence interval (CI) 1-19%) and 0/47 (0%, 95% CI 0-7.5%) in IVF/ICSI and IUI cycles, respectively. In both IVF/ICSI and IUI, progesterone and hCG were highly correlated (correlation coefficient 0.83 in both cases). Accordingly, the association of serum hCG levels with live birth achievement was similar in quartile analyses. Using receiver operating characteristic (ROC) curves and Youden’s indices, the optimal cut-off values for predicting live birth were determined as follows: 16.49 µg/l (89 % sensitivity (SN) and 59 % specificity (SP)) for IVF/ICSI and 15.89 µg/l (90 % SN and 70 % SP) for IUI therapy. Logarithmic regression analysis also revealed a significant correlation between progesterone levels and live birth in IVF/ICSI and IUI therapy, with a p-value of &amp;lt; 0.001. Limitations, reasons for caution Low progesterone in early pregnancy may be a consequence or a cause for pregnancy demise. DYD, like any other progesterone for LPS, might adversely impact corpus luteum formation and maintenance through HPO axis interaction, especially in mono-ovulatory cycles or in older women with inherently higher risk of luteal phase defect. Wider implications of the findings Ovarian stimulation and hCG-administration may induce a luteal phase defect with insufficient luteal activity in early pregnancy, even up to luteolysis, with potential consequences for pregnancy maintenance and maternal/fetal health. Future treatment protocols may require exploring an optimal luteotropic state at pregnancy’s outset, necessitating the establishment of relevant markers. Trial registration number not applicable

Progesterone versus combined estrogen and progesterone for luteal phase support (LPS) in women with unexplained infertility undergoing ICSI cycle: A randomized controlled, double-blinded study

Progesterone versus combined estrogen and progesterone for luteal phase support (LPS) in women with unexplained infertility undergoing ICSI cycle: A randomized controlled, double-blinded study

Oral dydrogesterone versus micronized vaginal progesterone for luteal phase support: a double-blind crossover study investigating pharmacokinetics and impact on the endometrium.

Oral dydrogesterone versus micronized vaginal progesterone for luteal phase support: a double-blind crossover study investigating pharmacokinetics and impact on the endometrium.

P-519 Is oral dydrogesterone a good alternative to vaginal micronized progesterone for luteal phase support in women receiving oocyte donation?

Abstract Study question Does oral dydrogesterone (OD) in luteal phase support (LPS) provide equivalent clinical pregnancy and miscarriage rates as micronized vaginal progesterone (MVP) in oocyte donation recipients? Summary answer No significant difference in clinical pregnancy and miscarriage rates was observed when using OD instead of MVP for LPS in oocyte donation. What is known already Dydrogesterone has a higher bioavailability than MVP due to its high specificity for progesterone receptors allowing the use of lower doses limiting side effects. In addition, because of its route of administration, its tolerance is better. The use of OD for LPS in fresh IVF cycles is now well recognized. However, few data are available on its use in frozen-thawed embryo transfer especially in artificial cycles. In this situation, the lack of corpus luteum leads to a total dependence on exogenous progestogens for implantation and maintenance of the pregnancy. Study design, size, duration A retrospective observational study was performed from prospectively collected data in the ART Department of Lille University Hospital from July 2018 to July 2022. Participants/materials, setting, methods Our study analysed 372 oocyte donation cycles with embryo transfer. Recipients underwent endometrial preparation by hormone replacement treatment (artificial cycles). LPS was provided by weekly intramuscular progesterone (500 mg/2ml) and either OD 40 mg per day or MVP 800 mg per day for 12 weeks if the pregnancy test was positive. The primary endpoint was clinical pregnancy rate. Main results and the role of chance This study compared the outcome of 162 transfers with dydrogesterone + IM progesterone to the outcome of 210 transfers with the MVP + IM progesterone. No significant difference was found between the two groups except for the number of embryos transferred, embryo quality, donor BMI and fresh or frozen status of the embryo. After adjustment for these criteria, our two groups were comparable in clinical pregnancy rates with 36.67% in the MVP group versus 30.25% in the OD group (OR 0.868 [0.529 ; 1.423], p = 0.57), ongoing pregnancy rates (29.05% versus 25.31%, OR 0.993 [0.591; 1.669], p = 0.97), miscarriage rates (7.62% versus 4.94%, OR 0.640 [0.248; 1.650], p = 0.35) and live birth rates (26.67% versus 17.69%, OR 0.727 [0.412; 1.284], p = 0.27). Limitations, reasons for caution The main limitation of this study is the non-randomisation of data between the two treatment groups. Wider implications of the findings Our study suggests that dydrogesterone has a place in our LPS strategies in artificial cycle for frozen embryo transfers or in oocyte donation, especially as this route is often preferred by patients and very well tolerated. Further prospective cohorts or randomized trials could continue to inform clinical practice on LPS. Trial registration number DEC 16-25

P-555 Do IVF patients prefer the rectal route to the vaginal for luteal phase progesterone administration? - a cohort study

Abstract Study question How do IVF patients perceive rectal administration of progesterone for luteal phase support compared to vaginally administered progesterone? Summary answer Rectal administration of progesterone causes less discomfort in IVF patients, undergoing Hormone Replacement Therapy Frozen Embryo Transfer (HRT-FET) and is preferred compared to vaginal administration. What is known already Progesterone is essential for implantation and normal development of pregnancy in spontaneous pregnancies as well as in ART pregnancies. In IVF, progesterone is most often administered vaginally in Europe for luteal phase support, although, this route may cause cumbersome discharge, vaginal bleeding, and irritation of the vulva. For many years the vaginal route has been the gold standard, although, progesterone is well absorbed rectally and recent studies have shown that rectally administered micronized progesterone was well accepted among IVF patients. Until now, in IVF very little focus has been on patient convenience as regards luteal phase support. Study design, size, duration An interventional cohort study, conducted from January 2020 to November 2022 in a public fertility clinic. A total of 479 patients received a questionnaire (Q1) by e-mail during the period between the embryo transfer and the pregnancy test; A second questionnaire (Q2) was answered at the time of the first ultrasound scan in gestational week 7. Participants/materials, setting, methods Patients underwent an HRT-FET protocol, including vaginal progesterone (VP) (400mg/12hours). In patients with serum progesterone levels lower than 11 ng/ml on the 6th day of progesterone, additional progesterone was administered rectally (RP) (400mg/12hours) from that day until the day of pregnancy testing, and in pregnant patients until the first scan in week 7. Side effects and patient convenience of both routes were reported in a questionnaire, including 27 questions, using a visual analog scale (0-100). Main results and the role of chance A total of 73% of HRT-FET patients (349/479) answered Q1 before the pregnancy test and a total of 27 % (93/349) of the cohort received progesterone both vaginally and rectally. The response rate of Q2 in gestational week 7 was 100 % (221/221) and a total of 28 % of patients (62/221) administered progesterone both vaginally and rectally. In Q1, a total of 60% of patients (54/90) preferred RP over VP in the cohort of patients treated with both administration regimens. In Q2, a total of 62% of patients (37/60) preferred RP over VP in the cohort of patients treated with both administration regimens. The overall discomfort was lower in relation to RP in both questionnaires and, especially discharge was lower in RP compared to VP; median interquartile range (IQR) in Q1: 11 (3-23) vs. 50 (25-66) and Q2: 19 (9-28) vs. 47 (22-62), respectively. Changes in defecation pattern after RP were reported in Q1 as well as Q2, 48% (45/92) and 55% (34/61), however, the discomfort was reported as mild. An increased flatulence was reported by 50% (46/92) in Q1 and 63% (39/92) in Q2, however, again the discomfort was reported as mild. Limitations, reasons for caution Currently, it is unknown whether the present results apply to progesterone products other than the one used in the present study (Cyclogest®). The questionnaire used, although having been used in another published study with another progesterone product, was not specifically validated for this product. Wider implications of the findings The rectal route should be remembered for luteal phase support in IVF, and some patients might choose the rectal route over the vaginal for their luteal phase support due to less discharge. Trial registration number EudraCT no.: 2019-001539-29

O-023 ‘The PiNC Trial’: Progesterone in Natural Cycles for the treatment of unexplained infertility

Abstract Study question Does exogenous progesterone for luteal phase support in natural cycles affect the biochemical, clinical pregnancy, livebirth or miscarriage rates in women with unexplained infertility (UI)? Summary answer Progesterone luteal support lead to an increase in livebirth rate from 7% to 15.3% and a decrease in miscarriage rates from 40% to 20%. What is known already Unexplained infertility is a diagnosis likely to encompass a population with varying underlying subtle pathologies. The only treatments currently recommended for treating UI are intrauterine insemination (IUI) and IVF/ICSI which are both expensive and invasive. The evidence for IUI with and without controlled ovarian hyperstimulation (COH) is inconclusive. A recent systematic review and meta-analysis reported a progesterone-mediated reduction in endometrial receptivity as a possible mechanism in the pathogenesis of UI. No trial has been published investigating the effectiveness of exogenous progesterone for luteal support in otherwise natural, unmedicated cycles to improve reproductive outcomes in couples with UI. Study design, size, duration We conducted an open-label, parallel arm, single centre, randomised controlled trial of an investigational medicinal product (cTIMP) from February 2020 to November 2022. We randomised 143 couples with UI to either luteal phase progesterone support or no luteal phase support and analysed the results on an intention-to-treat basis. Each couple participated for 3 menstrual cycles and they were followed up until either the end of a 3rd non-conceptual cycle or any resulting pregnancy. Participants/materials, setting, methods Couples with normal semen analysis (WHO 2020), regular ovulation, bilateral patent tubes, female partner aged ≤42yrs and BMI ≤30 were recruited and randomised following screening and informed consent. Participants timed their luteinising hormone (LH) surge using digital ovulation kits and had timed intercourse for 3 cycles. The treatment group took progesterone suppositories 400mg bd for 14 days after the LH surge. All pregnancies were scanned at 6-7/40 and ongoing pregnancies followed up to delivery. Main results and the role of chance 143 couples were recruited and randomised. Livebirth rates were 11/72 (15.3%) in the treatment group vs. 5/71 (7.0%) in the control group (Odds Ratio (OR) 2.38, 95%CI 0.78-7.24). Biochemical pregnancy rates (defined by a positive urinary pregnancy test) were 15/72 (20.8%) (treatment) vs 10/71 (14.1%) (control) (OR 1.61, 95%CI 0.67-3.86). Clinical pregnancy rates (defined by a gestation sac seen on ultrasound at a minimum of 6/40 gestation) were 14/72 (19.4%) (treatment) vs 9/71 (12.7%) (control) (OR 1.66, 95% CI 0.67-4.13). The miscarriage rate including biochemical losses was 3/15 (20%) of all pregnancies (treatment) vs. 4/10 (40%) (control). One pregnancy in the control group was terminated due to fetal anomalies. There was one ectopic pregnancy in the treatment group. Logistic regression demonstrated that none of the pregnancy outcomes were affected by participant age, BMI, ovarian reserve markers, previous parity or semen analysis parameters. The two participants in the treatment group who experienced miscarriages were both off-protocol. Although the results did not reach statistical significance, the 15.3% livebirth rate and OR of 2.37 for livebirths are clinically significant (equivalent to the success rates of stimulated intrauterine insemination treatment) as is the miscarriage rate of 0/11 clinical intra-uterine pregnancies for women taking progesterone as per protocol.Limitations, reasons for caution Despite the lack of statistical significance, differences in livebirth and miscarriage rates are clinically significant compared with alternative treatments. The trial was unblinded but the objective outcomes are unlikely to be affected by this. A larger trial using the effect size from this study to guide sample size is planned. Wider implications of the findings The treatment investigated here represents a simple, non-invasive and inexpensive option that is acceptable to couples with UI and may increase their chance of pregnancy and livebirth. If this treatment offers similar success rates to stimulated IUI it is likely to become a first-line option for many couple worldwide. Trial registration number 2019-003468-27

P-491 The efficacy of subcutaneous versus vaginal progesterone for luteal phase support - a comparison in 723 blastocyst hormone replacement therapy frozen embryo transfer cycles

Abstract Study question Are ongoing pregnancy rates (OPRs) similar between subcutaneous (sc) progesterone (P) and vaginal P administration in hormone replacement therapy (HRT) frozen embryo transfer (FET) cycles? Summary answer The OPRs were similar between sc and vaginal P administration; however, 15.8% of patients in the vaginal group needed additional P as rescue therapy. What is known already There is a paucity of data comparing sc and vaginal P administration in HRT-FET cycles. In HRT-FET cycles, there seem to be marked interpersonal differences in serum progesterone (P4) levels following the same dose and route of P administration. Impaired reproductive outcomes have been reported when serum P4 levels are below a certain threshold (10 ng/ml) on the FET/FET-1 day; rescue with supplemental sc P in these cases might rectify reproductive outcomes. With sc P, only one study reported comparable OPRs in four quartiles of serum P4 on the day of FET in HRT cycles. Study design, size, duration A cohort study was conducted during December 2019-November 2022, including a total of 723 consecutive warmed blastocyst transfer cycles, employing HRT. Each patient was included only once. The inclusion criteria were female age ≤44 years old, BMI ≤40 kg/m2, and having available day-5/6 vitrified blastocyst(s) after warming. Pre-implantation genetic testing cycles for aneuploidy (PGT-A) were included, whereas PGT for monogenic disorders/structural re-arrangements and the presence of uterine anomalies were excluded from the study. Participants/materials, setting, methods Following estrogen priming, sc P 25 mg twice-daily (n = 249) or vaginal P gel 90 mg twice-daily (n=474) were administered. The serum P4 level was measured on the FET-1 day, i.e., day 5 of P supplementation. In patients with serum P4 levels &amp;lt;8.75 ng/ml on the FET-1-day, additional exogenous sc P, 25 mg/day (rescue), was provided. The primary outcome measure was OPR. A generalized additive model was performed to study functional relationships between P4 and OPR. Main results and the role of chance The mean circulating P4 levels on the FET-1 day were 26.1 ± 8.1 ng/ml and 13.8 ± 5.5 ng/ml in the sc P and vaginal P gel groups, respectively (p &amp;lt; 0.001). In the vaginal P group, 15.8 % of patients needed sc P rescue, whereas no patient required rescue in the sc P group. All unadjusted reproductive outcome measures, including positive hCG per embryo transfer, implantation, clinical pregnancy, pre-clinical loss, miscarriage rates, and OPRs, were comparable between the sc P and vaginal P gel groups. After P rescue, when logistic regression analysis was performed to delineate the independent predictor(s) of ongoing pregnancy, only female age, number of blastocysts transferred, blastocyst morphology, and PGT-A were found to be the significant predictors. Importantly, sc P administration, necessitating no rescue, provided similar OPRs (adjusted OR = 1.22 95% CI:0.87-1.80) compared to vaginal P, in which rescue was needed in 15.8% of the patients. The impact of serum P4 levels on adjusted reproductive outcome measures was evaluated by percentiles (&amp;lt;10th, 10–49th, 50–90th, and &amp;gt;90th percentiles). All serum P4 percentiles had similar OPRs, and no significant association was observed between serum P4 levels and OPRs in both sc and vaginal P (with rescue if needed) groups. Limitations, reasons for caution Cohort study, lack of cost and side-effect analyses. Wider implications of the findings Subcutaneous P 25 mg twice-daily secures a serum P4 above 8.75 ng/ml, whereas additional exogenous P (rescue) was needed in 15.8% of patients receiving vaginal P administration only. The OPR was similar between the sc P alone and vaginal P groups after sc P rescue of the vaginal group. Trial registration number Not applicable

Association between serum progesterone levels on the day of frozen-thawed embryo transfer and pregnancy outcomes after artificial endometrial preparation

BackgroundPrevious studies have examined that a range of optimal serum P level during the implantation period was associated with optimal live birth rates. However, those results obtained with vaginal or intramuscular route of progesterone administration for luteal phase support (LPS) alone. Is there a relationship between the serum progesterone (P) on the day of frozen-thawed embryo transfer (FET) with the likelihood of a live birth (LB) in artificial cycles (AC) when using a combination of oral dydrogesterone and vaginal progesterone for LPS?MethodsThis was a retrospective study of 3659 FET cycles with artificial endometrial preparation in a Chinese tertiary-care academic medical centre from January 2015 to February 2017. Endometrial preparation was performed using estradiol (E2) valerate (Fematon-red tablets) 8 mg/d beginning on day 3 of the cycle, followed by administration of P both orally (8 mg/d Fematon-yellow tablets) and vaginally (400 mg/d; Utrogestan). The primary endpoint was live birth rate (LBR). The association between the serum P level on the embryo transfer day and pregnancy outcomes was evaluated by univariable and multivariable logistic regression analysis.ResultsThe LBRs according to the serum P quartiles were as follows: Q1: 35.7%; Q2: 37.4%; Q3: 39.1% and Q4: 38.9%. Logistic regression analysis showed that the odds of a LB were not significantly different between the low (P < 7.9 ng/mL) and high (P ≥ 7.9 ng/mL) progesterone groups before or after adjustment (crude OR = 0.89, 95% CI: 0.76–1.04; adjusted OR = 0.89, 95% CI: 0.75–1.04).ConclusionThe present study suggests that the serum P levels on the day of embryo transfer (ET) do not correlate with the likelihood of a LB in artificial cycles when using a combination of oral dydrogesterone and vaginal progesterone for luteal phase support.

Low Molecular Weight Heparin-Aspirin-Prednisolone Combination Does Not Increase the Live Birth Rate in Recurrent Implantation Failure: A Retrospective Cohort Study.

This study investigates the triple combination of adjuvants (low molecular weight heparin (LMWH)-aspirin-prednisolone) whether it improves the live birth rates of IVF&ICSI patients with previous implantation failure. This retrospective study included 1095 patients with >2 failed either fresh or frozen single embryo transfer cycles between 2014 Jan and 2021 Jan. Patients were divided into two subgroups. Group A consisted of patients with only vaginal progesterone for luteal phase support. Group B consisted of patients with triple (daily subcutaneous LMWH, daily 150 mg aspirin, and daily 16 mg prednisolone) luteal phase supplementation to vaginal progesterone. Demographic parameters, cycle characteristics, embryology, and pregnancy outcomes were compared, and the study's primary outcome was the live birth rate. Demographic parameters were similar between the groups. Positive b-hCG, miscarriage, and live birth rates were similar between groups as Group A vs. Group B, positive b-hCG 30.8% (190/617) vs. 35.4% (169/478), miscarriage rates 4.4% (27/617) vs. 6.7% (32/478), and live birth rates 20.4% (126/617) vs. 23.8% (114/478), respectively. When patients were stratified according to previous failures, live birth rates were still similar. Pregnancy outcomes were significantly improved in only patients with diminished ovarian reserve (Group A vs. Group B, positive b-hCG 24.2% vs. 34.3%, live birth rate 12.1% vs. 21.9%, p < 0.01). Whether the embryo transfer was fresh or frozen-thawed did not affect the results. A combined supplementation of LMWH, aspirin, and prednisolone in the luteal phase does not improve live birth rates of IVF&ICSI patients with previous implantation failure except potentially for patients with diminished ovarian reserve.

Сравнительный анализ эффективности и безопасности гестагенов в поддержке лютеиновой фазы в свежих циклах ЭКО/ИКСИ с переносом одного эмбриона

Objective. To study the efficacy and safety of dydrogesterone and micronized vaginal progesterone for luteal phase support in fresh IVF/ICSI cycles with single embryo transfer. Patients and methods. A retrospective comparative analysis including 146 women aged 23 to 44 years who entered an assisted reproductive technology (ART) program in 2020 was performed. Patients were divided into two groups: group 1 (n = 67) received dydrogesterone for luteal phase (LP) support in ART, while group 2 (n = 79) received micronized vaginal progesterone (MVP). All patients underwent a single good-quality embryo transfer in a fresh IVF/ICSI cycle. The rate of clinical pregnancy was considered as the primary endpoint, while the rate of live births and the safety profile of medications for mothers and neonates were considered as secondary endpoints. In addition, the incidence of adverse events with dydrogesterone and MVP was evaluated. Results. Clinical pregnancy and live birth rates with dydrogesterone as LP support in ART programs were 25/67 and 19/67 (37.3% and 28.4%, respectively), with MVP – 27/79 and 19/79 (34.2% and 24.1%, respectively). Thus, there was a tendency to improve the results of ART programs in the dydrogesterone group, but no statistically significant difference in outcomes was found (p &gt; 0.05). In the MVP group, one child was diagnosed with a malformation, syndactyly of the second and third toes. In the dydrogesterone group, one term stillbirth was registered due to chronic fetoplacental insufficiency and intrauterine growth restriction (IUGR). The suspected cause of pathological changes was COVID-19 at 30 weeks’ gestation. Based on the global report, the background risk of congenital malformations due to environmental and genetic factors is 6% of worldwide births. The results obtained did not exceed the population average, indicating a high safety profile of gestagens for a fetus in both groups. The incidence of side effects and adverse reactions was significantly lower in the group of women receiving dydrogesterone compared to MVP (3/67 (4.5%) and 11/79 (13.9%) cases, respectively, p &lt;0.05). Conclusion. LP support with gestagens in fresh IVF/ICSI cycles with single embryo transfer showed comparable efficacy. Oral dydrogesterone therapy tended to increase the rate of clinical pregnancy and live births in IVF/ICSI cycles with single embryo transfer and demonstrated a favorable safety profile. The benefits of dydrogesterone included good tolerability and positive patient satisfaction. The oral route of dydrogesterone administration was reported as the most preferred one among patients and physicians. Key words: ART cycles, single embryo transfer, gestagens, dydrogesterone, micronized progesterone

Tailored progesterone for luteal phase support: the way to go.

Tailored progesterone for luteal phase support: the way to go.

Addition of intramuscular to vaginal progesterone for luteal phase support in fresh embryo transfer cycles: A cross-sectional study.

Luteal phase deficiency is common in assisted reproductive technology and is characterized by inadequate progesterone production. Various studies have shown that administration of progesterone in fresh embryo transfer cycles increases the rate of clinical pregnancy and live birth rate. Progesterone administration has variable types: oral, vaginal, oil-based intramuscular, and subcutaneous. This study aims to compare the effect of adding intramuscular progesterone to the vaginal progesterone for luteal phase support in the fresh embryo transfer cycle. This study reviewed the information related to 355 women who had a fresh embryo transfer between March 2020 and February 2021 at the Yazd Reproductive Sciences Institute, Yazd, Iran. The participants population were divided into 2 groups based on the type of luteal phase support regime: group I (n = 173) received 400 mg vaginal progesterone alone twice a day from the day of ovum pick up; and group II (n = 182) received 50 mg IM of progesterone in addition to vaginal progesterone 400 mg twice a day from the day of ovum pick up. Chemical and clinical pregnancy rates were compared between groups. The basic characteristics of groups were statistically similar. The rates of chemical and clinical pregnancy were higher in the vaginal plus IM progesterone group than in the vaginal progesterone group. Moreover, chemical pregnancy showed a significant difference between the groups (p = 0.011). Our findings demonstrated that the addition of IM progesterone to the vaginal progesterone improves the chemical pregnancy rate in fresh embryo transfer.

P-419 Does adjuvant usage in the luteal phase improve live birth rates of ICSI - ET patients with previous implantation failure?

Abstract Study question Does adjuvant usage in the luteal phase improve live birth rates of ICSI-ET (intracytoplasmic sperm injection - embryo transfer) patients with previous implantation failure? Summary answer Combination of low molecular weight heparin, aspirin, and prednisolone in the luteal phase doesn't improve live birth rates of ICSI-ET patients with previous implantation failure. What is known already RIF affects around 10% of patients undergoing IVF worldwide. The exact pathology of implantation failure, although transferring a good quality embryo, is still unknown. There are numerous treatment options, However, there is no conclusive evidence that prophylactic treatment improves the pregnancy rate in infertile women during IVF. Study design, size, duration This retrospective study included 1095 patients with &amp;gt; 2 failed either fresh or frozen embryo transfer cycles between 2014 Jan – 2021 Jan. Participants/materials, setting, methods Patients were divided into two groups. Group-A consisted of patients with only vaginal progesterone for luteal phase support. Group-B consisted of patients with triple (daily subcutaneous low molecular weight heparin, daily p.o. 150 mg aspirin, and daily p.o. 16 mg prednisolone) luteal phase supplementation to vaginal progesterone. Demographic parameters, cycle characteristics, embryology, and pregnancy outcomes were compared, and the live birth rate was the study's primary outcome. Main results and the role of chance There were 5910 ICSI&amp;ET cycles between the years Jan 2014 and Jan 2021. A total of 3853 Patients with single day5-6 good quality blastocyst transfer was selected from the database, and appropriate patients for inclusion criteria with at least two previous failure implantation history were included. As a result, a total of 1095 fresh or frozen-thawed ET cycles were included in the study. There were 617 patients without (Group A) and 478 patients with adjuvant use (Group B). Demographic parameters were similar between groups. Although higher embryology outcomes (Group A vs. B, No.of oocyte; 11 (7-17) vs. 13 (8-19), No. of MII; 9(5-14) vs. 10 (6-15), No. of 2PN; 5 (3-9) vs. 6 (4-10), p &amp;lt; 0.01), positive b-hCG rates, miscarriage rates, live birth rates were similar between groups (Group A vs. B, positive b-hCG; 30.8% (190/617) vs. 35.4% (169/478), Miscarriage rates; 4.4% (27/617) vs. 6.7% (32/478), Live Birth Rates; 20.4% (126/617) vs. 23.8% (114/478)). When the live birth rates were stratified depending on the number of previous failed transferred cycles, the live birth rates were still comparable between the groups. Limitations, reasons for caution The study's retrospective design limits the power of the results. The study's main limitation is the lack of the euploidy information of transferred embryos. Wider implications of the findings Our findings suggest that empirical usage of adjuvants such as low molecular weight heparin, aspirin, and prednisolone does not improve live birth rates in patients with previous implantation failure. These results support the present literature. Trial registration number Not applicable

Dydrogesterone and 20α-dihydrodydrogesterone plasma levels on day of embryo transfer and clinical outcome in an anovulatory programmed frozen-thawed embryo transfer cycle: a prospective cohort study.

Dydrogesterone and 20α-dihydrodydrogesterone plasma levels on day of embryo transfer and clinical outcome in an anovulatory programmed frozen-thawed embryo transfer cycle: a prospective cohort study.

Evaluating interventions and adjuncts to optimize pregnancy outcomes in subfertile women: an overview review.

There is a wealth of information regarding interventions for treating subfertility. The majority of studies exploring interventions for improving conception rates also report on pregnancy outcomes. However, there is no efficient way for clinicians, researchers, funding organizations, decision-making bodies or women themselves to easily access and review the evidence for the effect of adjuvant therapies on key pregnancy outcomes in subfertile women. The aim was to summarize all published systematic reviews (SRs) of randomized controlled trials (RCTs) of interventions in the subfertile population, specifically reporting on the pregnancy outcomes of miscarriage and live birth. Furthermore, we aimed to highlight promising interventions and areas that need high-quality evidence. We searched the Cochrane Database of Systematic Reviews and PubMed clinical queries SR filter (inception until July 2021) with a list of key words to capture all SRs specifying or reporting any miscarriage outcome. Studies were included if they were SRs of RCTs. The population was subfertile women (pregnant or trying to conceive) and any intervention (versus placebo or no treatment) was included. We adopted Grading of Recommendations, Assessment, Development and Evaluation (GRADE) for determining the quality of the evidence. Exclusion criteria were overview reviews, reviews that exclusively reported on women conceiving via natural conception, reviews including non-randomized study designs or reviews where miscarriage or live birth outcomes were not specified or reported. The primary outcome was miscarriage, defined as pregnancy loss <24 weeks of gestation. Data were also extracted for live birth where available. We included 75 published SRs containing 121251 participants. There were 14 classes of intervention identified: luteal phase, immunotherapy, anticoagulants, hCG, micronutrients, lifestyle, endocrine, surgical, pre-implantation genetic testing for aneuploidies (PGT-As), laboratory techniques, endometrial injury, ART protocols, other adjuncts/techniques in the ART process and complementary interventions. The interventions with at least moderate-quality evidence of benefit in reducing risk of miscarriage or improving the chance of a live birth are: intrauterine hCG at time of cleavage stage embryo transfer, but not blastocyst transfer, antioxidant therapy in males, dehydroepiandrosterone in women and embryo medium containing high hyaluronic acid. Interventions showing potential increased risk of miscarriage or reduced live birth rate are: embryo culture supernatant injection before embryo transfer in frozen cycles and PGT-A with the use of fluorescence in situ hybridization. This review provides an overview of key pregnancy outcomes from published SRs of RCTs in subfertile women. It provides access to concisely summarized information and will help clinicians and policy makers identify knowledge gaps in the field, whilst covering a broad range of topics, to help improve pregnancy outcomes for subfertile couples. Further research is required into the following promising interventions: the dose of progesterone for luteal phase support, peripheral blood mononuclear cells for women with recurrent implantation failure, glucocorticoids in women undergoing IVF, low-molecular-weight heparin for unexplained subfertility, intrauterine hCG at the time of cleavage stage embryo or blastocyst transfer and low oxygen concentrations in embryo culture. In addition, there is a need for high-quality, well-designed RCTs in the field of reproductive surgery. Finally, further research is needed to demonstrate the integrated effects of non-pharmacological lifestyle interventions.