Incidence Of Pregnancy Complications Research Articles

Dydrogesterone vs. Progesterone: Which is More Effective in Threatened Miscarriage?

Background/Aims: Threatened miscarriage, marked by vaginal bleeding during the first 20 weeks of pregnancy, is a frequent complication with potential adverse outcomes. Dydrogesterone and micronized progesterone are commonly prescribed to manage this condition, yet their comparative efficacy remains under debate. This study aims to evaluate the effectiveness and safety of dydrogesterone versus micronized progesterone in treating threatened miscarriage. Methods: A retrospective case-control study was conducted at Our Hospital, including 123 pregnant women aged 6 to 20 weeks presenting with uterine bleeding. Participants were divided into two groups based on receiving either dydrogesterone (n=56) or micronized progesterone (n=67). Pregnancy outcomes, including miscarriage rates, preterm labor, and mode of delivery, were recorded and analyzed using SPSS software. Results: The miscarriage rate was slightly higher in the dydrogesterone group (9.6%) compared to the progesterone group (5.9%), though this difference was not statistically significant (p=0.729). Both groups exhibited high rates of successful delivery, with no significant difference between them (p>0.05). Additionally, no significant differences were observed in the incidence of pregnancy complications or mode of delivery between the two groups. Conclusion: Both dydrogesterone and micronized progesterone are effective in managing threatened miscarriage, with no significant differences in pregnancy outcomes. The choice of treatment should be individualized based on patient tolerance and side effect profiles. Further large-scale, randomized trials are needed to confirm these findings and refine treatment guidelines.

Deregulation of MicroRNA-146a and 155 expression levels might underlie complicated pregnancy in Toxoplasma Gondii seronegative women

BackgroundTo evaluate the ability of the estimated plasma expression levels of genes of microRNA (MiR-) 146a and 155 to differentiate between samples of pregnant women suspected to be infected by T. gondii. 50 newly pregnant women who had at least one of the criteria of high risk for toxoplasma infection and 50 newly primigravida women free of these criteria gave blood samples for qualitative determination of serum toxoplasma antibodies and estimation of plasma expression levels of MiR-146a and 155 using the qRT-PCR. During the pregnancy course, the incidence of pregnancy complications was recorded.ResultsTwenty-six women were IgM−/IgG−, 17 women were IgM+/IgG− and 7 women were IgM+/IgG+. Thirty-two women had pregnancy complications with significantly lower incidence in IgM−/IgG− women. Plasma expression levels of MiR-146a and 155 were significantly higher in total patients compared to control levels and were significantly higher in samples of IgM+/IgG+ patients than in other samples. Statistical analyses defined a high plasma level of MiR-155 as the highly significant predictor for oncoming pregnancy complications and high levels of both microRNAs as predictors for the presence of toxoplasmosis despite seronegativity. Kaplan-Meier regression analysis defined increasing cumulative risk of having toxoplasmosis despite seronegativity with plasma levels of MiR-146a and MiR-155 of 1.2 and 3, respectively.ConclusionThe incidence of pregnancy complications is high, irrespective of the seronegativity of women at high risk of toxoplasmosis. Estimated plasma levels of MiR-155 might identify women liable to develop complications and differentiate seronegative women vulnerable to having T. gondii infection.Trial registrationThe study protocol was approved preliminarily by the Local Ethical Committee at Benha Faculty of Medicine. Before enrollment, the study protocol was discussed in detail with the study participants, and those accepted to participate in the study signed written fully informed consents. The final approval of the study protocol was obtained after the end of case collection and registered by RC: 5-11-2022.

P-749 Maternal and obstetric outcomes following the transfer of embryos warmed with fatty acid supplemented solutions

Abstract Study question Does fatty acid (FA) supplementation into warming solutions influence maternal and obstetric outcomes after single vitrified-warmed cleavage stage embryo transfer (SVCT)? Summary answer FA-supplemented warming solutions improve the live birth rate after SVCTs without exerting any adverse effects on maternal and obstetric outcomes. What is known already Vitrification procedures decrease the intracellular lipid content and impair developmental competence. Adding fatty acids (FAs) to the warming solution has been shown to recover the lipid content of the cytoplasm and improve developmental competence and clinical pregnancy by stimulating the beta-oxidation pathway in warmed embryos. Recently, the FA-supplemented warming solutions have been commercially released. However, influence of the FA-supplemented supplementation on live birth rate after embryo transfers and perinatal outcomes remains unknown. Study design, size, duration The clinical records of 701 treatment cycles in 701 women who underwent SVCTs were retrospectively analysed. Vitrified embryos were warmed using solutions (from April 2022 to June 2022, control group, n = 340) or FA-supplemented solutions (from July 2022 to September 2022, FA group, n = 361). All pregnant women were invited to respond to the questionnaire at 9 weeks of gestation and after delivery. Maternal and obstetric outcomes were obtained from a self-reported questionnaire completed by the patients. Participants/materials, setting, methods The embryos in the FA group were warmed with the FA-supplemented solutions (VT526, Kitazato Corporation) while the embryos in the control group were warmed with the non-supplemented solutions (VT506, Kitazato Corporation). SVCTs were performed on day 2 after ovulation in natural cycles. The live birth rate, incidence of pregnancy complications, and neonatal outcomes were compared between the control and FA groups. Main results and the role of chance The live birth rate was higher in the FA group than in the control group (P = 0.0399). The miscarriage rates were comparable between the groups. Multivariate logistic regression analysis also demonstrated a higher probability of live births in the FA group than in the control group (adjusted odds ratio, 1.46; P = 0.0404). Patients were stratified by median maternal age for further analysis (37 years). This subgroup analysis showed that the live birth rate was significantly higher in the FA group than in the control group in women younger than 37 years of age. However, the live birth rate was comparable between the two groups for women aged 37 years or older. The incidence and types of pregnancy complications were comparable between the control and FA groups. Furthermore, caesarean section rates were similar between the groups. The average gestational age and incidence of preterm delivery were comparable between the groups. Birth length and weight, incidence of low birth weight, incidence of small for gestational age and large for gestational age, and infant sex were comparable between the groups. The incidence of birth defects was similar between the groups. Multivariate logistic regression analysis revealed a similar trend. Limitations, reasons for caution The single-centre retrospective study limits the strength of the study, necessitating further multicentre studies to ascertain the generalizability of these findings to other clinics with different protocols and/or patient demographics. Furthermore, the number of perinatal cycles was low. Wider implications of the findings The FA-supplemented warming solutions improved the live birth rates after SVCTs, particularly in young patients. Furthermore, the incidence of pregnancy complications and infant health was not affected by the FA-supplemented solutions. Therefore, FA-supplemented solutions can be considered safe and effective at improving clinical outcomes and reducing the patient burden. Trial registration number not applicable

Factors Affecting Pregnancy Complications in Ghana.

The prevalence of maternal mortality continues to be a significant health concern across the world. In Ghana, pregnancy-related complications in the previous 5 years account for 12% of all deaths among women 15 to 49 years. More than half of these deaths were avoidable if early assessment had been done. However, assessment of the pooled prevalence of pregnancy-related complications among pregnant women to inform policy is limited. This study sought to determine the factors contributing to pregnancy complications in Ghana. Using a systematic sampling technique, a facility-based cross-sectional study was conducted among 415 pregnant women who attended antenatal care (ANC) services at Mamprobi Hospital. Bivariate and multiple logistics regression analyses were conducted to test significant factors determining pregnancy complications. The results of regression analysis are reported in odds ratio. Statistical significance was set at p < 0.05. The mean age of the participants was 31.6 ± 6.6 years. The incidence of pregnancy complications among the pregnant women was 51.8% (95% CI, 0.47-0.56) The incidence of pregnancy complications among the women was significantly determined by age (adjusted odds ratio [AOR], 6.1; CI, 1.19-30.76), record of pregnancy complication (AOR, 2.5; CI, 1.35-4.49), ANC visit (AOR, 6.1; CI, 2.14-17.70), and family history of pregnancy complication (AOR, 3.6; CI, 1.25-10.40). Other significant factors included a record of abortion (AOR, 7.8; CI, 4.21-14.32), knowledge about obstetric danger signs (AOR, 2.4; CI, 1.21-4.88), and experiencing at least one obstetric danger sign during pregnancy (AOR, 6.6; CI, 3.30-13.29). The incidence of pregnancy complications was comparatively high among the women who used ANC services at Mamprobi Hospital. Early initiation of ANC services for pregnant women is an essential tool for addressing some of the challenges of early onset of some pregnancy complications, including anemia in pregnancy and preeclampsia. Midwives and other health workers who engage pregnant women should encourage their clients to initiate ANC visits at an early stage.

Platelet counts affect the association between hyperhomocysteinemia and pregnancy complications

BackgroundThe joint effect of platelet and other modifiers on the risk of pregnancy complications is unknown. This study investigated whether platelet count (PC) and total homocysteine (tHcy) level have a synergistic effect on the incidence of pregnancy complications in a Chinese population.MethodsTotal 11,553 consecutive pregnant women who received whole blood cell and biochemical tests at the time of admission for labor in Changzhou Maternal and Child Health Care Hospital were analyzed. The primary outcome was the prevalence of pregnancy complications: gestational diabetes mellitus (GDM), intrahepatic cholestasis of pregnancy (ICP), pre-eclampsia (PE), and pregnancy induced hypertension (PIH).ResultsThe prevalence of GDM, ICP, PE, and PIH was 8.4%, 6.2%, 3.4%, and 2.1%, respectively. The highest rate of ICP (28.6%) was observed in women with high tHcy (> 15 μmol/L) and low PC (quartile 1); and the lowest rate of GDM (0.6%) was found in women with high tHcy and high PC (quartiles 2 to 4). In low PC group, the prevalence of ICP in women with high tHcy was significantly higher than that in women with low tHcy (≤ 15 μmol/L) (28.6% vs. 8.4%), representing an absolute risk increment of 20.2% and a relative risk increment of 3.3-fold (OR: 3.34; 95% CI: 1.55, 7.17; P = 0.002), whereas no joint effect was observed among high PC group.ConclusionsAmong Chinese pregnant women, one subgroup (high tHcy and low PC) has the highest risk of ICP and another (high tHcy and high PC) has the lowest risk of GDM; tHcy and platelet could be used as indicators to identify the women with high risk of ICP or low risk of GDM.

The Effect of 2016 Chinese second-child policy and different maternal age on pregnancy outcomes in Hebei Province, China

ObjectiveTo explore the effect of the 2016 Chinese second child policy and different maternal ages on adverse perinatal outcomes.MethodsClinical data were collected from 22 monitoring hospitals in Hebei Province from January 1, 2013, to December 31, 2021. A total of 413,892 parturient were divided into 3 groups based on delivery age: 20–34, 35–39, and 40–55 years old. The clinical data were analyzed to explore the relationship among the 2016 Chinese second-child policy, maternal age, and various pregnancy risks.ResultsPregnancy complications showed an upward trend from 2013 to 2021.The top 10 incidences of pregnancy complications in Hebei Province were anemia, small for gestational age (SGA), large for gestational age (LGA), macrosomia, gestational diabetes mellitus (GDM), premature delivery, preeclampsia (PE), postpartum hemorrhage (PPH), placenta previa, and placental abruption. The two-child policy was implemented in 2016. The incidence of pregnancy complications, anemia, GDM, PE, placental abruption, cesarean delivery, premature delivery, SGA, LGA, macrosomia in 2016–2021 was significantly higher than that in 2013–2015 (P<0.05), and the proportion of women of advanced maternal age (AMA, ≥ 35 years old) increased from 2013 to 2021. Advanced maternal age was a risk factor for most assessed adverse pregnancy outcomes, including GDM, PE, placenta previa, placenta abruption, cesarean delivery, PPH, premature delivery, SGA, LGA and macrosomia.ConclusionAfter the adjustment of the “second-child” policy, the incidence of pregnancy complications increased. Moreover, the risk of adverse pregnancy outcomes in AMA has increased. Early prevention and intervention should be implemented to cope with the occurrence of adverse perinatal outcomes.

Effect of a 60-day weight reduction intervention prior to IVF/ICSI on perinatal outcomes in overweight or obese infertile women.

The aim of this study was to determine whether a 60-day weight reduction intervention prior to in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) and a higher weight loss ratio effectively improved perinatal outcomes for infertile overweight or obese women. This was a retrospective cohort study conducted at a university-affiliated fertility center. Two thousand three hundred and eighty-one overweight or obese infertile women who underwent or did not undergo a 60-day weight reduction intervention prior to IVF/ICSI between February 27, 2017 and November 11, 2020 were included in this study. All of these women achieved clinical pregnancy and delivered a single child after assisted reproductive technology (ART). Primary outcomes included neonatal birth weight and the incidence of pregnancy complications, premature delivery, and low birth weight. The body mass index (BMI), blood glucose concentration, serum insulin level, and homeostasis model assessment of insulin resistance (HOMA-IR) of the intervention group decreased significantly after the weight reduction intervention. Neonatal birth weight was significantly higher in the intervention group (3519.6g ±484.8 g) than the control group (3406.8g ± 554.2g; P < 0.001). There was no significant difference in the incidence of pregnancy complications between the two groups. Linear regression analysis found that the weight reduction intervention prior to IVF/ICSI and lower HOMA-IR at ovulation induction were associated with increased birth weight. As the weight loss ratio increased, the incidence of hypertensive disorders of pregnancy, premature membrane rupture, premature delivery, stillbirth, and low birth weight showed a downward trend. A 60-day weight reduction intervention prior to IVF/ICSI may increase neonatal birth weight, reduce maternal blood glucose concentration, and improve maternal insulin resistance in infertile overweight or obese women. This results require to be further verified by prospective randomized controlled trials with a larger sample size.

Exploration on appropriate fetal weight of twin pregnancies at different gestational weeks and pregnancy complications and outcomes

Objective: To explore the appropriate fetal weight of twin pregnancies at different gestational weeks and the association with pregnancy complications and outcomes. Methods: Fetal weight at different gestational weeks and related pregnancy complications and outcomes from 1 225 twin pregnancies, who gave birth at Peking University First Hospital from January 2004 to December 2020, were analyzed in this study, including hypertensive disorders in pregnancy, gestational diabetes mellitus (GDM), fetal growth restriction (FGR), fetal distress, preterm birth and neonatal asphyxia. The appropriate fetal weight of twin pregnancies at different gestational weeks were analysed based on the information from 616 twin pregnancies without complications (except preterm birth), and were expressed as P10~P90. The chi-square test was used to compare the risk of pregnancy complications and adverse outcomes in large for gestational age (LGA), appropriate for gestational age (AGA) and small for gestational age (SGA) twin pregnancies and the difference in incidence of pregnancy complications and adverse outcomes in different years. Results: The appropriate fetal weights of normal twin pregnancies at 28 to 37 weeks and 38-40 weeks of gestation were 910-1 255 g, 996-1 518 g, 1 105-1 785 g, 1 295-1 825 g, 1 336-2 000 g, 1 754-2 321 g, 1 842-2 591 g, 1 913-2 615 g, 2 150-2 847 g, 2 350-3 130 g and 2 450-3 250 g, respectively. The incidences of hypertensive disorders in pregnancy, FGR, fetal distress and neonatal asphyxia related to SGA twin pregnancies were significantly higher than AGA twin pregnancies (all P<0.05). The incidence of GDM in twin pregnant from 2017 to 2020 was higher than that from 2004 to 2009 or from 2010 to 2016, but the incidence of fetal distress and neonatal asphyxia were lower than those from 2010 to 2016, and the differences were statistically significant (all P<0.05). Conclusions: The appropriate weights of twin fetuses at different gestational weeks are different from singleton. The incidence of pregnancy complications and adverse outcomes in AGA fetuses is significantly lower than that in SGA fetuses under the specific weight standard for twin fetuses, which could provide a practical basis for clinical management of twin pregnancy.

Letrozole-induced endometrial preparation improved the pregnancy outcomes after frozen blastocyst transfer compared to the natural cycle: a retrospective cohort study

BackgroundLetrozole treatment is considered an effective option in endometrial preparation for frozen embryo transfers in patients with ovulation disorders or irregular menstruation; however, the effectiveness of letrozole-induced endometrial preparation remains unclear in ovulatory patients. Furthermore, there is no comparative study reporting on pregnancy complications and congenital anomalies after frozen embryo transfers comparing natural and letrozole-assisted cycles. This study examined whether letrozole-induced endometrial preparation affected pregnancy outcomes, perinatal outcomes, and congenital anomalies after single vitrified-warmed blastocyst transfers (SVBTs) in ovulatory patients, as compared with the natural cycle.MethodsThis historic cohort study included only patients with unexplained infertility. Overall, 14,611 patients who underwent SVBTs between July 2015 and June 2020, comprising both natural and letrozole-assisted cycles, were included. Multiple covariates that impact outcomes were used for propensity score matching; 1,911 patients in the letrozole group were matched to 12,700 patients in the natural group, and the clinical records of 1,910 patients in each group were retrospectively analysed. Cycle characteristics, pregnancy outcomes (clinical pregnancy, ongoing pregnancy, and live birth), and incidence of pregnancy complications and congenital anomalies were statistically compared between the two groups.ResultsMultivariate logistic regression analysis showed that letrozole administration during SVBT cycles significantly improved the live birth rate (P = 0.0355). Gestational age, birth length, birth weight, and infant sex, as well as the incidence of pregnancy complications and birth defects, were statistically comparable between the two groups. Furthermore, multivariate logistic regression analysis revealed that the perinatal outcomes were not affected by letrozole-induced endometrial preparation.ConclusionsLetrozole-induced endometrial preparation improved the live birth rate compared with the natural cycle, without adverse effects on perinatal outcomes and congenital anomalies after SVBTs. Therefore, letrozole-induced endometrial preparation might be a safe and more effective strategy, especially for patients with insufficient luteal function.

Secular increase in the prevalence of gestational diabetes and its associated adverse pregnancy outcomes from 2014 to 2021 in Hebei province, China.

We aimed to investigate the secular prevalence of gestational diabetes mellitus (GDM) and evaluate its adverse pregnancy outcomes among pregnant women in Hebei province, China. We analyzed the data from the monitoring information management system for pregnant women in 22 hospitals of Hebei province, China. In this study, 366,212 individuals with singleton live births from 2014 to 2021 were included, of whom 25,995 were diagnosed with gestational diabetes. We described the incidence of common complications and further analyzed the clinical characteristics in GDM patients and the relationship between GDM and adverse pregnancy outcomes. The top 3 pregnancy complications in Hebei province are anemia, gestational hypertension, and GDM. The average incidence of GDM was 7.10% (25,995/366,212). The incidence rate of GDM significantly increased from 2014 to 2021 (χ2 trend = 7,140.663, P < 0.001). The top 3 regions with GDM incidence were Baoding (16.60%), Shijiazhuang (8.00%), and Tangshan (3.80%). The incidence of GDM in urban pregnant women (10.6%) is higher than that in rural areas (3.7%).The difference between the GDM and Non-GDM groups was statistically significant in terms of maternal age, gravidity, parity, education level, and incidence of pregnancy complications (gestational hypertension, heart diseases, and anemia) (P < 0.05). GDM individuals were at significantly increased risk of most assessed adverse pregnancy outcomes, including premature delivery, Cesarean delivery, uterine inertia, neonatal intensive care unit (NICU) admission, Apgar (activity-pulse-grimace-appearance-respiration) score at 1min, and macrosomia (P < 0.05). The multivariate logistic regression analysis showed that GDM was an independent risk factor in terms of premature birth, Cesarean delivery, uterine inertia, placental abruption, NICU admission, and macrosomia. The risk of adverse pregnancy outcome in pregnant women with GDM is significantly increased. In order to reduce the occurrence of adverse pregnancy outcomes, effective interventions are needed.

Resuscitation with Intact Cord Versus Clamped Cord in Late Preterm and Term Neonates: A Randomized Controlled Trial

To compare the effect of intact cord versus clamped cord resuscitation on the physiologic transition of neonates receiving positive-pressure ventilation (PPV) at birth. This open-label, parallel-group, randomized controlled superiority trial was conducted in a tertiary care hospital in India. Neonates born at ≥34weeks of gestation after a complicated pregnancy or labor were randomized just before birth to receive resuscitation according to the Neonatal Resuscitation Program algorithm with either an intact cord (intact cord resuscitation group) or after early cord clamping (early cord clamping resuscitation group). The allocated study intervention was administered if the neonate needed PPV at birth. The primary outcome was expanded Apgar score at 5minutes after birth. Birth weight, gestational age, and the incidence of pregnancy complications were similar in the 2 study groups. The proportion of neonates who received PPV was lower in the intact cord resuscitation group (28.7% vs 36.5%, P=.05; relative risk, 0.79; 95% CI, 0.61-1.01). Among neonates who received PPV, the expanded Apgar score at 5minutes was significantly higher in the intact cord resuscitation group (median, 15 [IQR, 14-15] vs 14 [IQR, 13-15]; P<.001). The expanded Apgar score at 10minutes, Apgar scores at 5 and 10minutes, and oxygen saturation at 1, 5, and 10minutes were also higher in the intact cord resuscitation group. In late preterm and term neonates, resuscitation with an intact cord results in better postnatal physiologic transition than the standard practice of resuscitation after immediate cord clamping. Clinical Trial Registry of India (www.ctri.nic.in); trial registration no. CTRI/2020/02/023379.

Labor progression characteristics of primiparous term singleton pregnant women complicated with adenomyosis

Objective: To analyze the labor progression characteristics of primiparous term singleton pregnant women with adenomyosis. Methods: From April 2014 to May 2021, pregnant women underwent regular antenatal examination in Peking University Third Hospital were enrolled in this retrospective study, 109 primiparous term pregnant women with adenomyosis who underwent singleton, primipara, cephalic and vaginal delivery were referred as the adenomyosis group, while 109 pregnant women without adenomyosis primiparous term pregnant women at the same time were referred as the control group. The general clinical information, labor process intervention, pregnancy outcomes and labor course time of the two groups were analyzed. Results: (1) General clinical conditions: the pre-pregnancy uterine volume of the adenomyosis group was larger than that of the control group [(66.8±23.7) vs (41.4±13.1) cm3, P<0.05]. The proportion of assisted reproductive pregnancy and endometriosis in the adenomyosis group were higher than those in the control group [31.2% (34/109) vs 7.3% (8/109); 31.2% (34/109) vs 5.5% (6/109); all P<0.05]. There were no significant differences in maternal age, gestational age at delivery, pre-pregnancy body mass index, gestational weight gain, gravidity, incidence of pregnancy complications (gestational diabetes mellitus, pre-eclampsia and thyroid diseases) and premature rupture of membranes between the two groups (all P>0.05). (2) Labor process intervention and maternal and fetal outcomes: postpartum hemorrhage was higher in the adenomyosis group than the control group (median: 300 vs 260 ml, P=0.018). There were no significant differences in the proportion of labor onset, use of oxytocin, artificial rupture of membranes, perineal laceration Ⅲ and above, episiotomy, newborn weight and 1-minute Apgar score between the two groups (all P>0.05). (3) Time of labor process: there were no significant differences between the two groups in the time required for the first stage, third stage, total stage and cervical dilation 0-1, 1-2, 2-3, 3-4, 4-5, 5-6, 6-7 cm (all P>0.05). The time required for cervical dilation 7-8, 8-9, 9-10 cm and the second stage of labor in adenomyosis group (median: 20, 18, 15 and 12 minutes, respectively) were shorter than those of the control group (median: 23, 23, 23 and 26 minutes, respectively), and the differences were statistically significant (all P<0.05). (4) The effect of endometriosis on labor: there was no significant difference in the effect of endometriosis on labor in adenomyosis group (P>0.05). Conclusions: The labor process of primiparous term pregnant women with adenomyosis is significantly accelerated after the cervical dilatation for 7 cm, which should be closely observed. The third stage of labor course is managed aggressively with drugs to prevent postpartum hemorrhage.

O-272 Letrozole-induced endometrial preparation improved pregnancy outcomes after frozen blastocyst transfer compared to the natural cycle

Abstract Study question Does letrozole-induced endometrial preparation affect pregnancy outcomes, perinatal outcomes, and congenital anomalies after single vitrified-warmed blastocyst transfers (SVBTs) when compared with the natural cycle? Summary answer Letrozole-induced endometrial preparation improved live birth rate without any adverse effects on perinatal outcomes and congenital anomalies after SVBTs. What is known already Letrozole treatment is considered an effective option in endometrial preparation for frozen embryo transfers in patients with ovulation disorders or irregular menstruation; however, the effectiveness of letrozole-induced endometrial preparation is still unclear in ovulatory patients. Furthermore, there is no comparative study reporting on pregnancy complications and congenital anomalies after frozen embryo transfers comparing natural and letrozole-assisted cycles. Study design, size, duration This retrospective study, at a major academic fertility centre, analysed a total of 14,611 clinical records of women who underwent SVBTs comprising both natural and letrozole-assisted cycles between July 2015 and June 2020. The cycle characteristics, pregnancy outcomes (clinical pregnancy, ongoing pregnancy, and live birth), and the incidence of pregnancy complications and congenital anomalies were statistically compared between the natural and letrozole groups. Participants/materials, setting, methods The study reviewed ovulatory patients who underwent their first SVBT during the study period. Some patients took letrozole during the early proliferative phase to promote follicular development and maturation (letrozole group). Ovulation was triggered by GnRH agonist and SVBTs were performed on day five after ovulation. Propensity score matching was performed to reduce any bias from patient characteristics. Multivariate logistic analysis was performed to evaluate the effects of letrozole administration on pregnancy and perinatal outcomes. Main results and the role of chance After propensity score matching, the characteristics of patients and transferred blastocysts were comparable between groups. The serum progesterone level was also significantly increased in the letrozole group (P &amp;lt; 0.0001). Although no difference was observed regarding implantation rate between groups, the rates of clinical pregnancy, ongoing pregnancy, and delivery in the letrozole group were all significantly higher than that in the natural group (P = 0.0273, P = 0.0162, P = 0.0479, respectively). The incidence of early pregnancy loss, miscarriage, and stillbirth were comparable between groups. Multivariate logistic regression analysis also demonstrated that the administration of letrozole during an SVBT cycle significantly improved the live birth rate (AOR, 1.160; P = 0.0355). The incidence of pregnancy complications was comparable between groups. The caesarean section rate was significantly lower in the letrozole group than that in the natural group (P = 0.0464). Gestational age, birth length, birth weight, and infant sex, as well as the incidence of pregnancy complications and birth defects, were statistically comparable between groups. Furthermore, multivariate logistic regression analysis showed that perinatal outcomes were not affected by letrozole-induced endometrial preparation, although the incidence of caesarean section was decreased in the letrozole group (AOR, 0.788; P = 0.0355). Limitations, reasons for caution Our findings are not compared with reported incidences of pregnancy complications and congenital anomalies in natural pregnancy. Furthermore, the study was retrospective in nature, and further multicentre studies are required to ascertain the generalisability of these findings for other clinics with different protocols and/or patient demographics. Wider implications of the findings Letrozole administration both extended the proliferative phase and increased luteal function, resulting in an improvement of live birth rates without any adverse effects. Therefore, letrozole-induced endometrial preparation might be a safe and more effective strategy for patients with shortened proliferative phase or insufficient luteal function. Trial registration number not applicable

P-754 Perinatal outcomes and congenital anomalies after clomiphene citrate based minimal ovarian stimulation in vitro fertilisation stratified by embryo transfer method: a 10-year cohort study

Abstract Study question Is the embryo transfer method associated with perinatal outcomes and congenital anomalies after minimal ovarian stimulation in vitro fertilisation (IVF) with clomiphene citrate (CC)? Summary answer Single vitrified-warmed blastocyst transfers in natural cycles had a lower incidence of pregnancy complications compared to single fresh cleaved embryo transfers after CC-based ovarian stimulation. What is known already Pregnancies resulting from IVF are associated with a higher risk of adverse perinatal outcomes compared to spontaneous conception; therefore, the next focus in reproductive medicine is to assess whether the increased risks are attributable to the IVF. Perinatal outcomes and congenital anomalies should be considered in addition to pregnancy outcomes in selecting the embryo transfer method. However, studies describing the influence of transfer methods on perinatal and maternal outcomes are limited. Study design, size, duration This study retrospectively analysed a single centre 10-year cohort. A total of 82,491 clinical records of women who underwent oocyte retrieval during a CC-based minimal stimulation cycle followed by single fresh cleaved embryo transfer (SFCT), single vitrified-warmed cleaved embryo transfer (SVCT), or single vitrified-warmed blastocyst transfer (SVBT) at the Kato Ladies Clinic between January 2008 and December 2017 were retrospectively analysed. Participants/materials, setting, methods The oocyte retrievals were performed in CC-based minimal ovarian stimulation. The embryos were transferred 2–3 days after retrieval, or vitrified at the cleavage or blastocyst stages. The vitrified embryos were warmed and transferred within the natural cycles. Perinatal outcomes and congenital anomalies were stratified by the transfer method. Multivariate logistic regression analysis was performed to evaluate the effect of transfer methods on pregnancy complications and congenital anomalies. Main results and the role of chance The perinatal outcomes and congenital anomalies in 19,069 singleton pregnancies were analysed. Multivariate logistic regression analysis revealed that the incidence of hypertensive disorders of pregnancy was significantly lower in the SVBT group compared with the SFCT group (adjusted odds ratio [AOR], 0.628; P &amp;lt; 0.0001). The incidence of low-lying placenta (AOR 0.359 P = 0.0483; AOR 0.452 P &amp;lt; 0.0001, respectively) and placenta previa (AOR 0.300 P = 0.0021; AOR 0.542 P &amp;lt; 0.0001, respectively) were lower in the SVCT and SVBT groups than in the SFCT group. The rate of preterm delivery was lower in SVBT compared with SFCT (AOR 0.732 P &amp;lt; 0.0001). The rate of low birth weight was significantly lower after SVCT and SVBT, compared with the SFCT group (AOR 0.751; P = 0.0261: AOR, 0.560; P &amp;lt; 0.0001: respectively). A lower incidence of small for gestational age (AOR 0.720 P = 0.0436; AOR 0.494 P &amp;lt; 0.0001, respectively) and higher incidence of large for gestational age (AOR 1.287 P = 0.0332; AOR 1.706 P &amp;lt; 0.0001, respectively) were observed in the SVCT and SVBT groups compared to the SFCT group. The incidence of each congenital anomaly was similar among the groups. Limitations, reasons for caution The data was collected through self-reported parental questionnaires on neonatal outcomes and congenital malformations. Furthermore, this study was retrospective in nature; further studies are necessary to ascertain the generalisability of these findings to other clinics with different protocols and/or patient demographics. Wider implications of the findings This study demonstrated reassuring outcomes for SVBT, in terms of a lower incidence of pregnancy complications compared with SFCT. Our findings provide valuable knowledge to improve perinatal outcomes in CC-based stimulation and to inform couples of the possible benefits and harms of each type of embryo transfer method. Trial registration number not applicable

New Life Through Disaster: A Thematic Analysis of Women's Experiences of Pregnancy and the 2016 Fort McMurray Wildfire.

BackgroundOn May 3, 2016, residents of Fort McMurray Wood Buffalo, Alberta were evacuated due to an uncontrolled wildfire. The short-notice evacuation had destabilizing consequences for residents, including changes in routines, loss of control, and increased uncertainty. These consequences were especially detrimental to women who were pregnant or pre-conception during the evacuation. Pregnant and pre-conception women are particularly susceptible to a vast range of negative consequences during and post natural disasters, including elevated stress and higher incidence of pregnancy complications including gestational diabetes mellitus, pregnancy induced hypertension and C-section. The aim of this study was to understand the experiences, perceived stress and resilience of women who were pregnant during the wildfire. As well as to explore potential interventions to promote the health and enhance resilience of pregnant women and to assist in recovery after exposure to a natural disaster or other traumatic events.MethodsA qualitative thematic analysis of 16 narratives penned by pregnant women and recounted in Ashley Tobin's compilations 93/88,000 and 159 More/ 88,000: Stories of Evacuation, Re-Entry and the In-Between was conducted.ResultsAnalysis revealed five key themes: (1) experience of stress responses due to personal and external factors, (2) social connectedness and support as a facilitator of resilience, (3) performance of resilience-enhancing activities, (4) the roles of pregnancy and motherhood in the experiences of loss and resilience, and (5) the importance of home.ConclusionPregnant women have unique barriers that may negatively impact them during a natural disaster or other form of stressful event. They may benefit from assistance with navigating role transition during pregnancy, training in stress management strategies, and writing interventions to build resiliency and begin the process of recovery from trauma.

PECULIARITIES OF PREGNANCY AND DELIVERY IN WOMEN WITH HISTORY OF INFERTILITY

Institute of Hereditary Pathology of the National Academy of Medical Sciences of Ukraine, Lviv. Ukraine. Objective: to analyze data on somatic, reproductive, gynaecological history, pregnancy course and outcomes in women with a history of infertility residing in the Lviv region. Material and methods. The data and results of medical genetic counselling of 170 women aged 18-42 with a history of infertility (main group) were analyzed. The comparison was carried out with similar parameters of 80 healthy women aged 18-42 years in the control group. The data of somatic, reproductive, gynecological anamnesis, the pregnancy course and outcomes were studied. Statistical processing of the findings obtained was carried out by the Statistica 7.0 software package using the standard Excel 2013 statistical analysis package. Differences were considered statistically significant at p &lt;0.05. Results. The analysis of the data of the results of medical genetic counselling of 170 women with a history of infertility for 2019-2021 was carried out. The patients with a history of infertility were significantly more likely to be over 36 years of age compared to the same indicators in the control group. They had a complicated somatic anamnesis, 80.0% versus 20.0% in the control group, with a significant predominance of cardiovascular pathology (21.8% and 11.2%), and they also more often had reproductive history complications, 51 (30.0%) versus 11 (13.7%), mainly due to spontaneous miscarriages and missed pregnancies: 46 (27.0%) and 11 (13.7%), respectively. The gynaecological history in all these patients was complicated by infertility, and only infertility was in 113 (66.5%); infertility in combination with ovarian apoplexy was found in 17 (10.0%) and with ectopic pregnancy in 15 (8.8%) that was significantly higher in relation to respective data in the control group of women: 2 (2.6%) and 1 (1.3%), respectively. In women with a history of infertility, a high incidence of pregnancy complications was noted: 146 (85.9%) versus 39 (48.75%) in the control group: they more often gave birth for the first time: 110 (64.7%), and 35 (43.7%) in the control group. Analysis of the data obtained showed the presence of a large number of maternal risk factors for obstetric complications in this group of women. Conclusion. The study has demonstrated the risk factors for the occurrence of obstetric pathology in women with a history of infertility include presumably older age (over 36 years) (13.5%), a complicated reproductive history (30.0%) mainly due to spontaneous miscarriages and missed pregnancies (27.0%); complicated somatic history (80.0%) with a significant predominance of the pathology of the cardiovascular system (21.8%). A gynaecological history aggravated by infertility was found in all 170 (100.0%) women of the main group, and a significant increase in the combination of infertility with ovarian apoplexy was detected in 17 (10.0%) and with ectopic pregnancy in 15 (8.8%) women compared with the control group: 2 (2.6%) and 1 (1.3%), respectively. The complicated course of pregnancy was found in 85.9% of women with a history of infertility and in 48.75% of women in the control group; they more often gave birth for the first time: 110 (64.7%) versus 35 (43.7%) patients in the control group (p&lt;0.05). Women with a history of infertility are at risk for obstetric complications.

Prediction and Evaluation of Machine Learning Algorithm for Prediction of Blood Transfusion during Cesarean Section and Analysis of Risk Factors of Hypothermia during Anesthesia Recovery.

Prediction and Evaluation of Machine Learning Algorithm for Prediction of Blood Transfusion during Cesarean Section and Analysis of Risk Factors of Hypothermia during Anesthesia Recovery.

Statistical analysis of the SARS-CoV-2 effect on the gestation and childbirth course

Summary. Pregnancy is known to increase the risk of obstetric and neonatal sequelae in many viral complications. COVID-19, according to the WHO, is a disease caused by SARS-CoV-2 infection. Coronavirus disease in 2019, caused by severe acute respiratory syndrome, has spread rapidly around the world and has become a pandemic. Today, data on the impact of this disease on pregnancy and the development of possible complications for the fetus are being actively studied. The aim of the study – to learn the effect of SARS-CoV-2 in pregnant women on the subsequent gestation and childbirth course; to conduct a comparative analysis of the incidence of these complications with the overall average for the Perinatal Center "MUNICIPAL NON-PROFIT ENTERPRISE "TERNOPIL MUNICIPAL CITY HOSPITAL No. 2". Materials and Methods. The archived medical records including pregnancy and childbirth record form No. 096/o were analyzed in 33 parturient women, who labored in the Perinatal Center "MUNICIPAL NON-PROFIT ENTERPRISE "TERNOPIL MUNICIPAL CITY HOSPITAL No.2" in 2021–2022 and had SARS-CoV-2 coronavirus during this pregnancy. The incidence of pregnancy and childbirth complications in this group was analyzed in comparison with the overall average for this maternity hospital in 2021. The overall average for the Perinatal Center "MUNICIPAL NON-PROFIT ENTERPRISE "TERNOPIL MUNICIPAL CITY HOSPITAL No.2" for 2021 was calculated for 2218 childbirths that took place during this period. Results. The results showed that there was an increase in the incidence of pregnancy and childbirth complications in parturient women who had SARS-CoV-2 coronavirus during pregnancy compared with the average group. Thus, in the study group of women after coronavirus disease, the incidence of pregnancy complications was (compared to the average): placental dysfunction – 75.7 % (33.6 %), gestational toxicosis development – 51.5 % (24.3 %), abnormal amniotic fluid volume – 27.2 % (18.5 %), urinary tract infections – 15.1 % (8.8 %). The incidence of childbirth complications in the group of women who had SARS-CoV-2 coronavirus also increased significantly. Thus, in this group of women the number of physiological childbirths was 45 % (with an average of 51 %), the number of cesarean sections was 36.3 % (with an average of 25.2 %), dystocia and abnormal labors occurred in 18 % of women (with an average of 4.4 %), vacuum extraction was used in 6 % of women (with 2.2 % in the average group). The number of premature babies (15 %) and low birth-weight babies (21.2 %) increased among newborns in the group of women who had SARS-CoV-2 coronavirus. Conclusions. As a result of the analysis it was found that parturient women after SARS-CoV-2 had a significantly higher incidence of pregnancy and childbirth complications compared with the average. Timely prevention and diagnosis of complications after SARS-CoV-2 allows to treat effectively and perform on time delivery in this group of women and has positive consequences for both women and newborns

Analysis of pregnancy-related adverse outcomes in patients with severe hypothyroidism during pregnancy

Objective: To analyze the pregnancy-related adverse outcomes in patients with severe hypothyroidism during pregnancy. Methods: Using cross-sectional study, a total of 47 pregnant women with severe hypothyroidism in the Peking University First Hospital from January 2007 to December 2020 were retrospectively collected by electronic case system. According to the occurrence of adverse pregnancy events (defined as any pregnancy complication or adverse maternal-fetal/neonatal outcomes), the patients were divided into pregnancy-related adverse outcomes group (n=33) and no pregnancy-related adverse outcomes group (n=15). The demographic data, thyroid function and thyroid autoantibody levels during pregnancy, pregnancy complications and maternal-fetal/neonatal outcomes of the two groups were recorded and analyzed. Results: The age of severe hypothyroidism women was (30.5±4.1) years. The median of gestational week at delivery was 38.6 (36.3, 39.9) weeks, the median of gestational week for diagnosis was 7.0 (6.0, 8.8) weeks, the median of the highest TSH level was 32.7(23.1,60.2)mU/L and the period of reaching the target TSH level for the first time was 6.0(4.0, 10.0)weeks. Most cases (82.5%, 33/40) had thyroid autoimmunity. All women were treated with levothyroxine (L-T4) during pregnancy. A total of 37 cases (77.1%, 37/48) of them obtained the recommended target values. Fourty cases (83.3%, 40/48) gave birth. The birth weight of newborns was (3 041±452) g, the body length was (49.4±2.1) cm, and the head circumference was (33.6±0.7) cm. The period of reaching to target TSH level for the first time in patients without pregnancy-related adverse outcomes was shorter [5.0 (3.0, 9.0) vs 8.0 (4.5, 12.5) weeks) ] (P=0.033), and the times of thyroid function monitoring were more frequent [ (8.2±3.5) vs (6.0±3.6) times] (P=0.049) than the group with pregnancy-related adverse outcomes. Conclusions: The incidence of pregnancy complications and adverse maternal-fetal/neonatal outcomes is high in patients with severe hypothyroidism during pregnancy. Intense follow-up, treatment and restoration of euthyroidism as prompt as possible may improve pregnant outcomes.

Study on the related factors of intestinal obstruction after cesarean section

Objective: To analyze the related factors of intestinal obstruction after cesarean section. Methods: From April 2009 to April 2019, 500 patients with cesarean section and postoperative intestinal obstruction in Beijing Maternity Hospital Affiliated to Capital Medical University were taken as the case group, and 500 patients without postoperative intestinal obstruction who underwent cesarean section on the same day as the case group were taken as the control group. The data of patients' general characteristics, pregnancy complications, blood routine and biochemical indexes, and operation related factors were collected to compare the differences between patients with intestinal obstruction and patients without intestinal obstruction. Multivariate logistic regression model was used to analyze the related factors of intestinal obstruction after cesarean section. Results: The age of 500 patients with intestinal obstruction after cesarean section was (33.3±4.2) years, and the age of 500 patients without intestinal obstruction after cesarean section was (31.6±3.9) years. The incidence of pregnancy complications in patients with intestinal obstruction was higher than that in patients without intestinal obstruction (all P<0.05). Multivariate analysis showed that preoperative anemia [OR(95%CI) of 5.318(1.522-18.580), P=0.009], postoperative low protein [OR(95%CI) of 0.376(0.143-0.993), P=0.048], intraoperative bleeding ≥500 ml [OR(95%CI) of 3.085(1.551-6.136), P=0.001],intraoperative adhesion [OR(95%CI) of 2.856(1.285-6.347), P=0.010] were the risk factor of intestinal obstruction after cesarean section. The intraoperative application of antiadhesion drugs [OR(95%CI) of 0.322(0.158-0.654), P=0.002] was the protective factor of intestinal obstruction after cesarean section. Conclusions: Patients with anemia and low protein have an increased risk of intestinal obstruction after cesarean section.