Assisted Reproductive Technology Outcomes Research Articles

Male infertility: an overview of etiology, diagnosis and management

Male infertility, a multifaceted condition characterized by the inability to achieve pregnancy within a partner after a year of unprotected intercourse, affects approximately 7% of men globally. The etiology of male infertility is diverse, including genetic abnormalities, hormonal imbalances, physical obstructions, and lifestyle factors. This review synthesizes current knowledge on the causes, diagnostic methods, and therapeutic interventions for male infertility, with an emphasis on recent advances in genetic and assisted reproductive technologies (ART). The diagnostic approach to male infertility involves a comprehensive evaluation, including semen analysis, hormonal profiling, genetic testing, and imaging techniques, to identify underlying causes. Management strategies range from lifestyle modifications and pharmacological treatments to surgical interventions and ART, such as in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI). Emerging technologies, including the use of artificial intelligence in semen analysis and the development of novel sperm retrieval techniques, promise to enhance diagnostic accuracy and treatment outcomes. Despite significant progress, challenges remain in improving access to care and addressing ethical considerations in the use of ART. This review highlights the importance of a multidisciplinary approach to the management of male infertility, integrating advances in medical science with considerations of patient well-being and ethical standards. Future research directions include elucidating the genetic basis of idiopathic male infertility, optimizing ART outcomes, and developing personalized treatment strategies. The ultimate goal is to improve the reproductive health and quality of life for affected individuals and couples.

Comparison of Two Types of Endometrial Scratch before Embryo Transfer and Patient-Reported Pain Scores: A Prospective Randomized Pilot Study

Background: The impact of various methods of endometrial scratch during assisted reproductive technology (ART) is not well established. Objective: To compare patient-reported pain scores and ART outcomes following two types of endometrial scratch prior to embryo transfer. Study design: In this prospective, non-blinded, randomized controlled trial, patients were assigned to either Pipelle or Shepard catheter. The primary outcome was mean pain score. Secondary outcomes included implantation rate (IR) and clinical pregnancy rate (CPR). Results: One hundred seventy transfers were included (Pipelle: n=78, Shepard: n=92). Mean pain scores were significantly lower in the Shepard group compared to the Pipelle group (3.0±2.4 vs. 3.9±2.2, respectively; p=0.01). There was no significant difference in IR (Shepard: 59.7%±52 and Pipelle: 56.5%±48; p=0.9) and CPR (Shepard: 67.6%±47 and Pipelle: 71.8%±45; p=0.6). Conclusions: In our study, the Shepard catheter was a less painful method of endometrial scratch without compromising ART outcomes.

Advanced Glycation End-Products of Follicular Fluid are Associated with Embryo Morphokinetic Parameters and ART Outcomes.

Advanced glycation end products (AGEs) can disrupt antioxidant system and steroidogenesis, resulting in detrimental effects on assisted reproductive technology (ART) outcomes. This study aimed to investigate the association of AGEs in follicular fluid (FF) with morphokinetic parameters of embryos and ART outcomes. Fifty women undergoing ART treatment were studied. AGEs, glucose, 25(OH) vitamin D, malondialdehyde (MDA) levels and catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPX) activities were evaluated in FF. The expression of 3βHSD, CYP11A1, and CYP19A1 genes were analyzed in granulosa cells (GCs) by qRT-PCR technique. Morphokinetic parameters were evaluated using time-lapse technology. The FF level of AGEs was reversely associated with CAT, SOD, and GPX activities, and total and mature oocytes number, blastocyst formation rate, and high-grade embryos number, while it showed positive correlations with the FF MDA levels, the expression of steroidogenesis genes, number of immature oocytes, morphokinetic parameters, and number of low-grade embryos. Furthermore, the level of vitamin D in FF had an inverse association with AGEs and positive correlations with ART outcomes and morphokinetic parameters. Comparison between the those with positive and negative biochemical pregnancy showed no significant differences in terms of FF factors and just the expression of 3βHSD, CYP11A1, and CYP19A1 genes were higher in pregnant women (p < 0.05). AGEs could delay blastomere division and lead to an increase in the number of low-quality embryos, while vitamin D have an adverse effect on AGEs and a protective function against AGEs negative effects.

Moving toward Narrowing the United States Gap in Assisted Reproductive Technology (ART) Racial and Ethnic Disparities in the Next Decade.

The Disparities in Assisted Reproductive Technology (DART) hypothesis, initially described in 2013 and further modified in 2022, is a conceptual framework to examine the scope and depth of underlying contributing factors to the differences in access and treatment outcomes for racial and ethnic minorities undergoing ART in the United States. In 2009, the World Health Organization defined infertility as a disease of the reproductive system, thus recognizing it as a medical problem warranting treatment. Now, infertility care is largely recognized as a human right. However, disparities in Reproductive Endocrinology and Infertility (REI) care in the US persist today. While several studies and review articles have suggested possible solutions to racial and ethnic disparities in access and outcomes in ART, few have accounted for and addressed the multiple complex factors contributing to these disparities on a systemic level. This review aims to acknowledge and address the myriad of contributing factors through the DART hypothesis which converge in racial/ethnic disparities in ART and considers possible solutions to effect large scale societal change by narrowing these gaps within the next decade.

The Contribution of Proteomics in Understanding Endometrial Protein Expression in Women with Recurrent Implantation Failure.

Recurrent implantation failure (RIF) poses a significant challenge in assisted reproductive technology (ART) outcomes. The endometrium plays a crucial role in embryo implantation, and its protein expression profile is integral in determining receptivity. Proteomics has emerged as a valuable tool in unraveling the molecular intricacies underlying endometrial receptivity and RIF. The aim of the present review is to analyze the contribution of proteomics to the understanding of endometrial protein expression in women with RIF, based on the results of significant proteomic studies. Medline/Pubmed databases were searched using keywords pertaining to proteomics combined with terms related to RIF. 15 studies were included in the present review. Several proteins have been found to exbibit differential expression in endometrial biopsies and fluid samples between fertile women and women with RIF during the receptive endometrial phase. The profile of endometrial proteins varied significantly among the studies. Nevertheless, similar changes in the expression levels of annexin-6, progesterone receptor, MMP-2, and MMP-9 in the endometrium of women with RIF, were found in more than one study indicating that certain proteins could potentially be effective biomarkers of endometrial receptivity. Proteomics contributes significantly to the understanding of protein expression in the endometrium of women with RIF and the analysis of proteins in endometrial fluid are promising for improving the clinical management of RIF.

Different Nuclear Architecture in Human Sperm According to Their Morphology.

Human sperm parameters serve as a first step in diagnosing male infertility, but not in determining the potential for successful pregnancy during assisted reproductive technologies (ARTs) procedures. Here, we investigated the relationship between sperm head morphology at high magnification, based on strict morphologic criteria, and the nuclear architecture analyzed by fluorescence in situ hybridization (FISH). We included five men. Two of them had an elevated high-magnification morphology score of 6 points (Score 6) indicating high fertility potential, whereas three had a low score of 0 points (Score 0), indicating low fertility potential. We used FISH to study the inter-telomeric distance and the chromosomal territory area of chromosome 1 (Chr. 1). We then compared these two parameters between subjects with high and low scores. FISH data analysis showed that the inter-telomeric distance (ITD) and chromosomal territory area (CTA) of Chr. 1 were significantly higher in subjects with low scores (score 0) than high scores (score 6). Our results suggest that (i) there is a link between nuclear architecture and sperm head abnormalities, particularly vacuoles; and (ii) it is possible to select spermatozoa with normal nuclear architecture, which might indirectly explain the positive ART outcomes observed with this technique.

Impact of cesarean scar defect on reproductive outcomes after assisted reproductive technology.

In the last twenty years, the cesarean section rate has been rising in China, leading to an increased prevalence of cesarean scar defect (CSD) and secondary infertility. CSD decreases receptivity of endometrium, induces adenomyosis and endometriosis, disrupts uterine micro-environment and causes difficulties in embryo transplant operation as well as has further pregnancy complications. For women undergoing assisted reproductive technology (ART), CSD significantly reduces live birth rate, clinical pregnancy rate and embryo implantation rate. CSD can be effectively treated by hysteroscopic surgery, laparoscopic surgery and transvaginal surgery to increase the pregnancy rate. This article reviews the research progress on the impact of CSD on the reproductive outcomes of ART, the potential factors and related treatments, and provides a reference for the management of CSD patients undergoing ART.

Abstinence for sperm sample collection and ART outcome: an unsubstantiated myth.

Semen analysis is a basic component of male evaluation. Reproductive centers typically instruct men to provide a semen specimen based on recommendations from WHO Standard for semen examination. Evidence that these recommendations optimize sperm reproductive capacity is lacking. Existing data to optimize sperm quality with shorter abstinence were reviewed. Several recent studies have reviewed the effects of shorter ejaculatory abstinence of semen quality and assisted reproductive technology (ART) outcomes. Shorter abstinence was defined as 1 h-1 day in one review, and <4 h in the other systematic meta-analysis and review. Prior instructions for male patients have not been designed to optimize fertility potential for semen analyses. Optimal sperm quality is obtained by instructing men to have a short abstinence (certainly <1 day, and preferably <4 h) for semen specimens used for in vitro fertilization (assisted reproduction).

Embryo long-term storage does not affect assisted reproductive technologies outcome: analysis of 58,001 vitrified blastocysts over 11 years

BackgroundRecently the potential detrimental effect that the duration of storage time may have on vitrified samples has raised some concern, especially when some studies found an association between cryo-storage length and decreased clinical results. ObjectiveThis study aimed to evaluate the effects of the storage time length of day-5 vitrified blastocysts in two study groups: freeze-all cycles and non elective frozen embryo transfers (FET). Study designThis was a retrospective study including 58001 vitrified/warmed day-5 blastocysts from two different populations according to the reason for FET. Elective FET comprised freeze-all cycles (N=16615 blastocysts and 16615 patients) where only single embryo transfers (SET) and only the first FET were included. The non elective FET group included 41386 embryos from 25571 patients where FET took place using supernumerary embryos after fresh embryo transfer. All the possible FETs were included. Both SET and double embryo transfers (DET) were included. Donor and autologous oocytes were used. The period covered by this study was 11 years. The blastocysts sample was clustered into deciles which provided specific storage duration categories. Main outcome was live birth rate (LBR) and secondary outcomes were embryo survival, miscarriage, clinical and ongoing pregnancy rates according to storage duration. The impact of storage time was assessed by univariable analyses in both groups. The comparison was made between each decile to the last one. A multivariable logistic regression analysis was conducted including the variables with significant association found in the univariate analysis. Student's t-test and Chi squared tests, or an analysis of variance were used wherever appropriate. P < 0.05 was considered statistically significant. ResultsThere were statistical differences in baseline characteristics of patients included in the study groups. Storage durations ranged from ≤ 0.67 to ≥ 4.34 and from ≤ 1.8 to ≥ 34.81 months in freeze-all and non elective FET respectively. Embryo survival did not show statistical differences across the categories of storage time in freeze-all and non elective FET groups. Statistical differences were found for the LBR across some, but not all the subgroups of storage duration. The multivariable analysis showed no association between storage time and the LBR in both groups (NS). Blastocyst quality, body mass index (BMI), number of retrieved oocytes, endometrial preparation, male factor and uterine factor were related to the drop in the LBR in the freeze-all group (p<0.05). In the non elective FET group the variables that showed significant association with the LBR were, age at retrieval and at FET, type of FET (SET or DET), number of retrieved oocytes, BMI, endometrial preparation, origin of sperm sample and female factor. ConclusiónThis large study demonstrated no association between storage time and clinical outcome. Other variables such as patient's age, embryo quality, BMI and etiology, are somewhat responsible for impacting outcome. This provides evidence for the safety of embryo vitrification, even after long storage periods. This is reassuring for both IVF practitioners and the patients undergoing FET of either elective or non elective embryos.

Genetic factors of reproductive disorders in female

Successful reproduction in mammals requires gamete development, fertilization, and early embryonic development. Defects in any of these processes can lead to infertility, recurrent miscarriages, and congenital defects. The clinical recognition of the genetic causes of female reproductive insufficiency using increasingly advanced genetic technologies poses a serious challenge for reproductive medicine in the 21 st century. Herein, current literature on genetic factors involved in reproductive losses was summarized. A literature search was conducted using Web of Science, MEDLINE, and PubMed databases for articles written in English on the genetic causes of women’s reproductive health disorders. Future implementation of whole-exome and -genome sequencing is expected to identify numerous genetic factors responsible for oocyte quality. Which will aid in increasing the likelihood of successful female reproductive function, improve the outcomes of assisted reproductive technologies, optimize treatment, and facilitate genetic diagnosis of patients.

Discovering therapeutic possibilities for polycystic ovary syndrome by targeting XIST and its associated ceRNA network through the analysis of transcriptome data

Long non-coding RNA (lncRNA) regulates many physiological processes by acting as competitive endogenous RNA (ceRNA). The dysregulation of lncRNA X-inactive specific transcript (XIST) has been shown in various human disorders. However, its role in the pathogenesis of polycystic ovary syndrome (PCOS) is yet to be explored. This study aimed to explore the underlying mechanism of XIST in the pathogenesis of PCOS, specifically through dataset functional analysis. GEO PCOS datasets including RNA-seq, microarray, and miRNA-seq in granulosa cells (GCs) and blood, were examined and comprehensively analyzed. Enrichment analysis, ROC curve constructions, lncRNA-miRNA-mRNA interaction network analyses, and qRT-PCR validation were performed followed by a series of drug signature screenings. Our results revealed significant dysregulation in the expression of 1131 mRNAs, 30 miRNAs, and XIST in GCs of PCOS patients compared to healthy individuals. Of the120 XIST-correlated upregulated genes, 25 were enriched in inflammation-related pathways. Additionally, 5 miRNAs were identified as negative regulators of XIST-correlated genes. Accordingly, a ceRNA network containing XIST-miRNAs-mRNAs interactions was constructed. Furthermore, 6 genes, including AQP9, ETS2, PLAU, PLEK, SOCS3, and TNFRSF1B served as both GCs and blood-based biomarkers. By analyzing the number of interactions among XIST, miRNAs, and mRNAs, we pinpointed ETS2 as the pivotal gene within the ceRNA network. Our findings reveal a novel XIST- hsa-miR-146a-5p, hsa-miR-144-3p, and hsa-miR-1271-5p-ETS2 axis that comprehensively elucidates the XIST-associated mechanism underlying PCOS onset. qRT-PCR analysis further confirmed the, overexpression of both XIST and ETS2 . Furthermore, our results demonstrated that XIST and ETS2 were correlated with some assisted reproductive technologies outcomes. Finally, we identified two novel compounds including, methotrexate/folate and threonine using drug–gene interaction databases for PCOS management. These findings provide novel insights into the molecular etiology, diagnosis, and potential therapeutic interventions for PCOS.

Quantifying the association of sperm DNA fragmentation with assisted reproductive technology outcomes: An umbrella review.

Systematic reviews and meta-analyses are instrumental in shaping clinical practice. However, their findings can sometimes be marred by discrepancies and potential biases, thereby diluting the strength of the evidence presented. Umbrella reviews serve to comprehensively assess and synthesise these reviews, offering a clearer insight into the quality of the evidence presented. In the context of the relationship between sperm DNA fragmentation (SDF) and assisted conception outcomes, there is a divergence in the literature. Some reviews suggest a clear cause-and-effect linkage, whereas others present conflicting or inconclusive results. In this umbrella review we aimed to synthesise the evidence collated in systematic reviews and meta-analyses summarising the association of SDF with assisted reproductive technology (ART) outcomes. After preregistration (https://doi.org/10.17605/OSF.IO/6JHDP), we performed a comprehensive search of the PubMed, Scopus, Cochrane Library, Web of Science and Embase databases. We conducted a search for systematic reviews on the association between SDF and ART without any restrictions on language or publication date. Systematic reviews and meta-analyses assessing the association between SDF and ART outcomes were eligible. We assessed the quality of the included reviews using AMSTAR 2 and ROBIS, and determined the degree of overlap of primary studies between reviews estimating the corrected covered area (CCA), adjusted for structural missingness. We evaluated the most recent reviews assessing the association of SDF with live birth, pregnancy, miscarriage, implantation, blastulation and fertilisation. The synthesis of evidence was harmonised across all included quantitative syntheses, re-estimating the odds ratio (eOR) in random-effects meta-analyses with 95% confidence intervals (95% CIs) and 95% prediction intervals (95% PIs). We categorised the evidence strength into convincing, highly suggestive, suggestive, weak or nonsignificant, according to the meta-analysis re-estimated P-value, total sample size, I2 statistic for heterogeneity, small study effect, excess significance bias and the largest study significance. We initially captured and screened 49 332 records. After excluding duplicate and ineligible articles, 22 systematic reviews, 15 of which were meta-analyses, were selected. The 22 reviews showed a moderate degree of overlap (adjusted CCA 9.2%) in their included studies (overall n = 428, with 180 unique studies). The 15 meta-analyses exhibited a high degree of overlap (adjusted CCA = 13.6%) in their included studies (overall n = 274, with 118 unique studies). AMSTAR 2 categorised the quality of evidence in 18 reviews as critically low and the quality of evidence in four reviews as low. ROBIS categorised all the reviews as having a high risk of bias. The re-estimated results showed that the association of SDF with live birth was weak in one and nonsignificant in four meta-analyses. Similarly, the association of SDF with pregnancy, miscarriage, implantation, blastulation and fertilisation was also weak or nonsignificant. The association of high SDF with different ART outcomes was also weak or nonsignificant for different interventions (IVF, ICSI and IUI) and tests. This umbrella review did not find convincing or suggestive evidence linking SDF with ART outcomes. Caution should be exercised in making any claims, policies or recommendations concerning SDF.

Demographic distributions and clinical results of assisted reproduction techniques in Turkey in 2019: a descriptive survey.

The aim of this study was to describe characteristics and outcomes of assisted reproductive technology (ART) cycles performed in 2019 in Turkey. One-hundred and sixty-five ART centers in Turkey were invited to submit data. The survey was sent to center directors via e-mail with anonymous links by Qualtrics™. The survey involved questions about their patient characteristics, clinical practices, and outcomes. Forty-one (24.8%) centers responded to e-mails, and data gathered from 25 centers was included in the analyses. In 25 centers, 18,127 fresh or frozen transfers were carried out during the study period, of which 7796 (43.0%) were fresh and the rest were either frozen (45.2%) or embryo transfers (ET) with preimplantation genetic testing (PGT) (11.8%). The live birth rate per ET was as 30.6%, 40.1%, and 50.7% in fresh, frozen and PGT cycles, respectively. A single embryo was transferred in 65.3% of all transfers and singleton live births comprised 86.1% of all deliveries. For cycles with intrauterine insemination, 1407 were started in 2019, and 195 clinical pregnancies, 150 live births with 19 multiple pregnancies occurred. A total of 1513 ART cycles were initiated for foreign patients. Russia (29.6%), Germany (7.4%), Iraq (4.6%), Uzbekistan (3.1%), and Syria (1.4%) were the top five countries with most patients coming to Turkey for ART. The survey results are in parallel with the reports of international institutions and organizations. With repeated editions, the data collected with annual surveys can be used to inform ART practices in the coming years.

Association of Plasma Metal Levels with Outcomes of Assisted Reproduction in Polycystic Ovary Syndrome.

The objective of this study is to explore the correlation of metal levels with assisted reproductive technology (ART) outcomes in polycystic ovary syndrome (PCOS) patients. The individuals were recruited who met the research criteria, only tubal factor or male infertility served as the control group (n = 40) and patient group was PCOS patients (n = 35). Individuals (n = 75) were divided into PCOS group (n = 35) and control group (n = 40). The normal body mass index (BMI) group (control) includes women with BMI < 25kg/m2 in PCOS group (n = 24) and control group (n = 33), and BMI ≥ 25kg/m2 in PCOS group (n = 11) and control group (n = 7). We performed an analysis of insulin resistance (IR) (n = 15) group and without insulin resistance (NIR) group (n = 20) in PCOS patient and control patients. Comparing difference demographic data, ART outcomes and the metal levels in every group respectively, the correlation of metal levels and ART outcomes in control participants and PCOS patients were analyzed by the Spearman correlation analysis, and multiple linear regression model was used to examine the association between the concentration of 19 metals and ART outcomes in PCOS group and control group. Plasma manganese (Mn), titanium (Ti), sodium (Na), magnesium (Mg), copper (Cu), calcium (Ca)/Mg ratio, and Cu/zinc (Zn) ratio levels in PCOS patients were higher than that in control, while Zn and Ca levels were lower in PCOS patients than that in control. The Mg levels had a positive connection with the number of eggs recovered, and the iron (Fe) levels were positively associated with the number of transplanted embryos in PCOS-IR. In PCOS-NIR, Mn levels positively correlated with the number of follicles and the number of good embryos. Silver (Ag) levels were negatively correlated with the number of follicles, and aluminum (Al) levels were negatively related with the normal fertilization and the number of good embryos. The Spearman analysis in PCOS-BMI ≥ 25 group exhibited that nickel (Ni) levels were negatively associated with the number of follicles. The plasma metal levels seem to affect the clinical manifestations and in vitro fertilization outcomes in assisted reproduction.

Aggressive sperm immobilization improves reproductive outcomes in patients with suboptimal semen parameters and previous ICSI fertilization failure

Intracytoplasmic sperm injection (ICSI) is the most effective procedure to resolve male infertility, enhancing overall fertilization and pregnancy outcomes. However, it is important to note that fertilization failure (FF) can still occur in a few cases after ICSI. This study aims to introduce a specialized technique of aggressive sperm immobilization for ICSI and evaluate its impact on reproductive outcomes in cases involving prior fertilization failure. All infertile couples with male partners having suboptimal semen samples and previous ICSI fertilization failure were evaluated using retrospective data from National Taiwan tertiary university hospital (NTUH) between January 2016 and February 2022. Fertilization failure in our study was defined as less than 30% fertilization rate (FR, the number of normally fertilized oocytes divided by the total number of injected mature oocytes). Data involving both standard (routine procedure) and aggressive sperm immobilization (SI) techniques during different ICSI cycles were included in this study. Standard and aggressive SI methods were performed by compressing the distal half tail of the spermatozoa ≦ 5 and 15 times prior to ICSI respectively. Generalized estimating equations analysis were applied to compare the clinical outcomes between two procedures. Overall, data from 23 infertile couples who had undergone 65 ICSI cycles (31 standard SI with low fertilization rate and 34 aggressive SI) were included in the study. The average FR in the ICSI cycles with standard SI and aggressive SI were 23.6 ± 23.1% and 49.5 ± 31.8 respectively (P = 0.0002). The majority of embryos were transferred at the day 3 stage, with an average number transferred of 2.6 ± 0.9 in the aggressive SI group and 1.9 ± 0.9 in the standard group. The number of embryos transferred per transfer cycle was higher in the aggressive SI (P = 0.015), whereas the number of good-quality embryos was similar between the two procedures (P = 0.44). There were one and seven live births from the standard SI cycles and aggressive SI cycles respectively. In conclusion, aggressive SI was associated with a significantly higher FR, resulting in more available embryos for transfer without compromising embryo quality. Therefore, this specialized technique improved pregnancy outcome among infertile couples with a previous ICSI–FF. It can be a safe, economic, and effective method to improve the assisted reproductive technologies outcomes for infertile patients affected by previous ICSI–FF.

Vertical transmission of microbiomes into embryo culture media and its association with assisted reproductive outcomes

Research Question: Can microbes vertically transmit from semen and follicular fluids to embryo culture media during assisted reproductive technology (ART) treatments?Design: Spent embryo culture media (SECM) were collected along with seminal fluid and follicular fluid samples from 61 infertility couples undergoing ART treatment at the Prince of Wales Hospital, Hong Kong SAR, China. Metagenomic analysis was conducted to identify the source of microbes in SECM, the correlation between semen microbiomes and male infertility, and the correlation between follicular fluid microbiome and female infertility.Results: Microbial vertical transmission into SECM was reported in 82.5% of the cases, and semen was the main source of contamination in c-IVF cases. The increased abundances of Staphylococcus and Streptococcus anginosus in semen showed statistically negative impacts on sperm count and total motility, respectively (p <0.001). We observed significant increases in the abundances of Prophyromonas, Neisseria, and Facklamia in follicular fluid in women with anovulation, uterine factor infertility, and unexplained infertility, respectively (p <0.01). Finally, there was no significant correlation between the bacteria identified in all sample types with ART outcomes including fertilization rates, embryo development, the number of available embryos, and clinical pregnancy rates.Conclusion: Embryo culture media can be contaminated during ART treatment, not only by seminal microbes but also by follicular fluid and other sources of microbes. There were strong correlations between specific microbial taxa in semen and sperm quality as well as between follicular fluid microbiomes and the etiology of female infertility. However, the microbiome of SECM, semen, and follicular fluid showed no significant association with ART treatment outcomes.

Сравнение прогностических моделей, построенных с помощью разных методов машинного обучения, на примере прогнозирования результатов лечения бесплодия методом вспомогательных репродуктивных технологий

Сравнение прогностических моделей, построенных с помощью разных методов машинного обучения, на примере прогнозирования результатов лечения бесплодия методом вспомогательных репродуктивных технологий

Small extracellular vesicles in follicular fluids for predicting reproductive outcomes in assisted reproductive technology

BackgroundAssisted reproductive technology accounts for an increasing proportion of infertility treatments, and assessments to predict clinical pregnancy outcomes are desired. Extracellular vesicles exist in follicular fluid, and small non coding RNAs in extracellular vesicles underline the possibility of reflecting pregnancy potential.MethodsFollicular fluid samples are collected from 20 ovarian follicles of 15 infertile patients undergoing assisted reproductive technology. Extracellular vesicles are isolated by serial centrifugation and small RNA sequencing is performed to investigate the profiles of microRNAs and P-element-induced wimpy testis-interacting RNAs.ResultsSmall extracellular vesicles with a size range of approximately 100 nm are successfully isolated, and the small non coding RNA profiles of pregnant samples (n = 8) are different from those of non-pregnant samples (n = 12). Fourteen dysregulated small non coding RNAs are selected to identify the independent candidates [mean read count >100, area under the curve >0.8]. Among them, we find that a specific combination of small non coding RNAs (miR-16-2-3p, miR-378a-3p, and miR-483-5p) can predict the pregnant samples more precisely using a receiver operating characteristics curves analysis (area under the curve: 0.96). Furthermore, even in the same patients, the three microRNAs are differentially expressed between pregnant and non-pregnant samples.ConclusionsOur results demonstrate that small non coding RNAs derived from small extracellular vesicles in follicular fluid can be potential non-invasive biomarkers for predicting pregnancy, leading to their probable application in assisted reproductive technology. Further large-scale studies are required to validate the clinical usefulness of these small non coding RNAs.

MicroRNAs in spermatogenesis dysfunction and male infertility: clinical phenotypes, mechanisms and potential diagnostic biomarkers.

Infertility affects approximately 10-15% of couples worldwide who are attempting to conceive, with male infertility accounting for 50% of infertility cases. Male infertility is related to various factors such as hormone imbalance, urogenital diseases, environmental factors, and genetic factors. Owing to its relationship with genetic factors, male infertility cannot be diagnosed through routine examination in most cases, and is clinically called 'idiopathic male infertility.' Recent studies have provided evidence that microRNAs (miRNAs) are expressed in a cell-or stage-specific manner during spermatogenesis. This review focuses on the role of miRNAs in male infertility and spermatogenesis. Data were collected from published studies that investigated the effects of miRNAs on spermatogenesis, sperm quality and quantity, fertilization, embryo development, and assisted reproductive technology (ART) outcomes. Based on the findings of these studies, we summarize the targets of miRNAs and the resulting functional effects that occur due to changes in miRNA expression at various stages of spermatogenesis, including undifferentiated and differentiating spermatogonia, spermatocytes, spermatids, and Sertoli cells (SCs). In addition, we discuss potential markers for diagnosing male infertility and predicting the varicocele grade, surgical outcomes, ART outcomes, and sperm retrieval rates in patients with non-obstructive azoospermia (NOA).

Effectiveness of Autologous Platelet-Rich Plasma Therapy in Women with Repeated Implantation Failure: A Randomized Clinical Trial.

Platelet-rich plasma (PRP) therapy has been shown to enhance tissue regeneration by expressing several cytokines and growth factors (GFs). This study investigated the effect of intrauterine infusion of PRP as a noninvasive autologous GF on pregnancy outcomes in women with repeated implantation failure. This randomized clinical trial was conducted to compare the pregnancy rates between two groups of women who were candidates for the frozen-thawed embryo transfer with a history of two or more implantation failures. The PRP group (n=33) was treated with hormone replacement therapy+0.5 cc to 1 cc PRP infused into the uterine cavity two days before the embryo transfer. The control group (n=33) was only treated with hormone replacement therapy. The endometrial preparation process was done similarly in both groups. The chemical, clinical, and ongoing pregnancy, and implantation rates were compared between the two groups. Our results showed that the chemical pregnancy rate was not statistically higher in the PRP group in comparison with the control group (36.4 vs. 24.2%). In addition, the clinical pregnancy, ongoing pregnancy, and implantation rates were higher in the PRP group than the control group; however, the difference between the two groups was not statistically significant. Administration of intrauterine PRP before embryo transfer in women with repeated implantation failure (RIF) does not affect assisted reproductive technology (ART) outcomes (registration number: IRCT2016090728950N3).