What is the best mode of delivery in nulliparous, singleton, term, vertex pregnancies of individuals ≥ 35 years old?: Short title: What is the best mode of delivery in nulliparous, singleton, term, vertex pregnancies?

With approximately 145 million births occurring worldwide each year - over 30 million by cesarean delivery, the need for evaluation of maternal and perinatal outcomes in different delivery scenarios is more pressing than ever. Recently, in a meta-analysis of the available randomized controlled trials (RCTs), planned cesarean delivery was associated with decreased rates of low umbilical artery pH, and neonatal complications such as birth trauma, tube feeding, and hypotonia when compared to planned vaginal delivery. Among singleton pregnancies, planned cesarean delivery was associated with a lower rate of perinatal death. For mothers, planned cesarean delivery was associated with significantly less chorioamnionitis, more wound infection, and less urinary incontinence at 1-2 years. Conversely, planned vaginal delivery has been associated with benefits such as a lower incidence of wound infection and quicker postpartum recovery compared to planned cesarean delivery. Nonetheless, several risk factors for cesarean delivery are increasing - such as older maternal age, obesity, diabetes, excessive gestational weight gain, and birth weight - while maternal pelvises are getting smaller. Concerns about the potential long-term risks of multiple cesarean deliveries, such as placenta accreta spectrum disorders, highlight the need for a balanced evaluation of both delivery modes. However, the total fertility rate is decreasing in the US and around the world, with many people wanting two or fewer babies, which decreases future risk of placenta accreta incurred by multiple cesarean deliveries in these individuals. Furthermore, one in four obstetricians-gynecologists has undergone a cesarean delivery on maternal request for their nulliparous, singleton, term, vertex (NSTV) pregnancy, and cesarean delivery rates less than about 19% have been associated with higher perinatal and maternal mortality. Thus, we propose that it is imperative that we prioritize conducting randomized trials to compare planned cesarean to planned vaginal delivery for NSTV pregnancies. Such trials would need to include 8,000 or more individuals; they would ideally follow each participant to the end of their reproductive life and study perinatal and maternal outcomes, including non-biologic outcomes such as patient satisfaction, postpartum depression, breastfeeding rates, mother-infant bonding, post-traumatic stress, and cost-effectiveness. The time for such a trial is now, as it holds the potential to inform and improve obstetrical care practices globally.

Endocrine Characteristics and Obstetric Outcomes of PCOS Patients with Successful IVF and Non-IVF Pregnancies.

Background/Objective: Infertility affects an estimated 40-50% of women with polycystic ovary syndrome (PCOS), the leading cause of anovulatory infertility, but only a small proportion of the patients require in vitro fertilization (IVF) therapy. Both PCOS and IVF are associated with an increased risk of obstetric complications. To compare preconception endocrine profiles and symptoms, as well as obstetric outcomes of PCOS patients who achieved successful pregnancies with and without IVF treatment. Methods: A single-center retrospective cohort study was conducted. Data spanning from 2012 to 2019 were compiled from patients with PCOS who visited the Gynecologic Endocrinology Unit and the Infertility Unit at the Department of Obstetrics and Gynecology, University of Debrecen. Patients diagnosed with PCOS who had had at least one successful delivery beyond the 23rd gestational week at the department were eligible for inclusion in the study. Results: Fifteen percent of the 206 pregnancies leading to successful deliveries of 232 newborns in our cohort conceived with IVF. A one year increase in the maternal age increased the odds of being in the IVF group by 22% (OR: 1.222, 95% confidence interval, CI: 1.11-1.35, p < 0.001). Baseline DHEAS and androstenedione levels were significantly lower in the IVF group as compared to the non-IVF group: 1 µmol/L increase in the DHEAS level decreased the odds of being in the IVF group by 18% (OR: 0.82, 95% CI: 0.66-1.01, p = 0.06), and 1 µg/L increase in the serum androstenedione concentration decreased the same odds by 42% (OR: 0.58, 95% CI: 0.33-1.02, p = 0.056). DHEAS levels <6.5 µmol/L had an OR 3.86 (95% CI 1.10-13.50, p = 0.04) and LH/FSH ratio <1.3 had an OR 3.58 (95% CI 1.18-10.81, p = 0.03) for being in the IVF group. The birth weight (3069 ± 683 g vs. 3362 ± 638 g, p = 0.02) and the gestational age (37.23 ± 2.55 vs. 38.54 ± 2.28 weeks, p = 0.004) were significantly lower in the IVF group, but in the singleton subgroups, no significant differences could be found. Birth weight percentiles showed no significant difference in either subgroup. In the IVF group, both preterm delivery (29% vs. 8.3%, OR 4.53, 95% CI 1.75-11.70, p = 0.002; singleton subgroup: 17.4% vs. 6.3%, OR 3.12, 95% CI 0.89-10.92, p = 0.07) and cesarean section (71% vs. 43.2%, OR 3.22, 95% CI 1.40-7.40, p = 0.006; singleton subgroup: 65.2% vs. 42.4%, OR 2.55, 95% CI 1.02-6.35, p = 0.04) were more frequent than in the non-IVF group. Gestational diabetes and preeclampsia were not significantly different in the IVF and non-IVF groups. Conclusions: In PCOS patients with successful pregnancies, those who conceive with IVF seem to be different in their baseline hormone levels and symptoms from the non-IVF group. Adverse obstetric outcomes are more common in the IVF group, and some of these differences persist when adjusting for singleton pregnancies and maternal age, too.

Navigating Pregnancy With Uterine Fibroids: A Case Study.

Benign uterine tumors, known as leiomyomas or uterine fibroids, can result in severe pain, bleeding, and infertility. They impact a woman's overall well-being, ability to conceive, and the course of her pregnancy. Fibroids are associated with increasing maternal age. When a patient with fibroids is considering pregnancy, ultrasonography and a detailed pelvic examination should be performed to determine the size and location of any fibroids. This case study details a 30-year-old female patient who had fibroids during her pregnancy and responded well to treatment.

The impact of hyperandrogenemia on pregnancy complications and outcomes in patients with PCOS: a systematic review and meta-analysis.

BACKGROUND: Polycystic ovary syndrome (PCOS) is a metabolic and reproductive disorder. Current research findings present conflicting views on the effects of different PCOS phenotypes on outcomes in pregnancy and for newborns. METHODS: This research study followed the guidelines of the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA). A thorough search of literature was carried out using the Cochrane Menstrual Disorders and Subfertility Group trials register, Web of Science, and EMBASE databases from their start to December 2023. The search focused on studies examining the links between hyperandrogenic and non-hyperandrogenic PCOS phenotypes and risks in pregnancy and neonatology. Odds ratios (ORs) and 95% confidence intervals (CIs) were computed using either a fixed-effects or random-effects model. RESULTS: Our analysis incorporated 10 research studies. Expectant mothers with a hyperandrogenic PCOS subtype had increased ORs for gestational diabetes mellitus (GDM) and preeclampsia (PE) compared to those with a non-hyperandrogenic PCOS subtype, with respective values of 2.14 (95% CI, 1.18-3.88, I2 = 0%) and 2.04 (95% CI, 1.02-4.08, I2 = 53%). Nevertheless, no notable differences were detected in ORs for outcomes like preterm birth, live birth, miscarriage, cesarean delivery, pregnancy-induced hypertension, small for gestational age babies, large for gestational age newborns, and neonatal intensive care unit admissions between pregnant women with hyperandrogenic PCOS phenotype and those without. CONCLUSIONS: This meta-analysis highlights that the presence of hyperandrogenism heightens the risks of GDM and PE within the PCOS population. Healthcare providers ought to be aware of this connection for improved patient management.

Do Birth Outcomes Predicted by Occipital Position Inform Definitions of Occiput Posterior and Occiput Transverse?

Fetal head position significantly influences birth outcomes, with higher rates of complications observed when the fetal head is in the Occiput Posterior (OP) position compared to Occiput Transverse (OT) or Occiput Anterior (OA) positions. There is no consensus in the current literature on the precise rotational point at which the fetal occiput shifts from posterior to transverse, reducing clarity in both scientific and clinical communication. Different studies employ varying definitions of these positions, which affects management decisions. This study aims to determine if a definable threshold exists between the directly posterior and directly transverse positions that correlates with different birth outcomes, thereby proposing a consistent and clinically useful definition for OP versus OT. We analyzed ultrasound data from 570 patients at full dilatation from five previous studies, correlating the angle of the fetal occiput (noted on a clock-face) with birth outcomes. Adverse outcomes were defined as cesarean delivery, instrumental vaginal delivery, significant postpartum hemorrhage (500 ml or more), obstetric anal sphincter injury, five-minute Apgar scores <7, arterial cord pH <7, base excess less than -12, or neonatal intensive care unit admission. The analysis was conducted using SAS version 9.4. The study found a continuous relationship between the fetal occipital angle and adverse birth outcomes without a distinct threshold separating OP from OT positions. No clear inflection point was demonstrated in pregnancy outcomes between OT and OP. The relationship between the angle of occiput position and pregnancy outcomes was continuous: the closer the fetal head was to directly OP, the higher the likelihood of adverse outcomes. Given the lack of a clear cut-off and to improve consistency in future research, we recommend dividing the occiput position into four quadrants of 90 degrees each. This classification could standardize reporting and potentially improve clinical decision-making regarding fetal position during labor.

Long working hours and obstetric complications: A cross-sectional study among female doctors.

Objective: To investigate the effects of long working hours on pregnancy complications and obstetric outcomes among female doctors working in tertiary care hospitals of Karachi. Study design: A cross-sectional study was conducted on 149 female MBBS graduates (mean age: 33.5 ± 7.3 years) who had conceived at least once, currently working in two tertiary-care hospitals of Karachi. Data was collected through a self-administered questionnaire containing questions regarding demography and course of 1st pregnancy of the participants including working hours, antenatal and natal complications. Means and standard deviations were calculated for continuous variables with frequencies and percentages for categorical variables. The association between long working hours and different antenatal and natal complications was investigated using Chi-square test and T-test. Results: Out of 149 participants included in final analysis, 85.9 % doctors gave birth to alive babies while 12.8 % had miscarriages and 1.3 % had stillbirth. Mean working hours during the three trimesters were found to be 53.76, 53.66 and 48.7, respectively. 43 % doctors experienced at least one antenatal complication during their pregnancy. Women who worked more than or equal to 55 h per week during 1st, 2nd and 3rd trimester of their pregnancy experienced more antenatal complications than women who worked less than 55 h (p-value=0.042, 0.021 and 0.018 respectively). 61.7 % females experienced at least one natal complication, most common of which was induction of Labour (39.1 %). Natal complications were significantly associated with increased workload during 2nd trimester (mean 58 vs 46 h, p-value 0.040). Doctors belonging to surgical specialty had 2.7 times higher risk of developing at least one natal complication than doctors of medical specialty (95 % Cl: 1.235-5.870). Conclusion: Long working hours during pregnancy are associated with antenatal complications among female doctors. Natal complications were only significantly related to long working hours during 2nd trimester of pregnancy, however, female surgeons are more prone to develop natal complications than doctors belonging to medical specialties.

From Oral Health to Obstetric Outcomes: A Comprehensive Review of Periodontal Disease and Its Implications for Preeclampsia.

Periodontal disease and preeclampsia (PE) are both significant health concerns with implications for maternal and fetal well-being. Emerging evidence suggests a potential association between these two conditions, prompting increased interest in understanding their relationship and clinical implications. This comprehensive review examines the current literature on periodontal disease and PE, focusing on epidemiological evidence, proposed mechanistic pathways, and clinical implications. Epidemiological studies consistently demonstrate an increased risk of PE among pregnant individuals with periodontal disease, independent of traditional risk factors. Proposed mechanisms linking periodontal disease to PE include systemic inflammation, endothelial dysfunction, and immune dysregulation. The implications for research include the need for well-designed prospective studies and randomized controlled trials to elucidate further the mechanisms underlying the association and evaluate the effectiveness of periodontal interventions in preventing PE. Clinicians should be aware of the potential link between periodontal disease and PE and consider screening pregnant individuals for periodontal disease as part of routine prenatal care. Interdisciplinary collaboration between obstetricians and periodontists may be beneficial in managing pregnant individuals with periodontal disease to mitigate the risk of PE. By addressing these research gaps, we can further understand the relationship between oral health and obstetric outcomes and develop evidence-based strategies to improve maternal and fetal health.

The effects of climate change and environmental pollution on human reproduction: A scientific review commissioned by the European Board and College of Obstetrics and Gynaecology (EBCOG).

The European Board and College of Obstetrics and Gynaecology (EBCOG) and the European Network of Trainees in Obstetrics and Gynaecology (ENTOG) express their concerns on the effect of climate change and environmental pollution. This paper reviews the impact on reproductive health and the contribution to climate change by the field of obstetrics and gynaecology. It concludes that its contributors and the effects of climate change cause definite adverse consequences to fertility and adverse obstetric outcomes. Mankind, and obstetrics and gynaecology personnel as well, must be aware and responsible of its contribution to climate change and consider the impact of their actions and interventions.

Nonpronuclear- and monopronuclear-derived blastocysts do not impair subsequent perinatal and maternal outcomes.

CONTEXT: The routine clinical practice is to prioritize the transfer of blastocysts derived from 2PN embryos if they are available. For women who only have blastocysts resulting from 0PN and 1PN embryos, whether to transfer these embryos or discard them has been an ongoing debate over the years. OBJECTIVE: To investigate the perinatal and obstetric outcomes following the transfer of vitrified-warmed single blastocysts derived from 0PN and 1PN zygotes. DESIGN: Retrospective cohort study. SETTING: University-affiliated IVF center. PATIENT(S): This study included singletons born to women who had undergone 0PN and 1PN vitrified-warmed single blastocyst transfers, compared to those resulting from 2PN vitrified-warmed single blastocyst transfers from 2012 to 2020. INTERVENTIONS: None. MAIN OUTCOME MEASURE(S): Perinatal and obstetric outcomes. RESULT(S): A total of 7,284 women were included in the final analysis. Of these, 386, 316, and 6582 cycles resulted from 0PN-, 1PN-, and 2PN-derived blastocysts transfer, respectively. The rates of clinical pregnancy, miscarriage, and live birth were similar across the study cohorts in both unadjusted and adjusted analyses. When comparing the 0PN and 2PN groups, no differences were found in birth outcomes after adjusting for confounders. Similarly, maternal complications and mode of delivery were comparable between these two study cohorts. Birth parameters were also similar between the 1PN and 2PN blastocyst groups, except for more male births in the 1PN cohort. Furthermore, a comparison between the 1PN and 2PN groups did not reveal any significant differences in maternal outcomes. CONCLUSION: The current study showed that the transfer of 0PN and 1PN blastocysts did not compromise reproductive outcomes or increase maternal and perinatal complications. This information is valuable for clinicians to counsel couples effectively and guide them in making informed decisions.

Is Assisted Reproductive Technology Linked to Fetal Asphyxia? A Retrospective Italian Case-Control Study.

Several risk factors are associated with fetal asphyxia. The main aim of this retrospective, analytical, case-control study was to determine whether assisted reproductive technologies (ART) could be considered one of these factors. In total, 162 cases of fetal asphyxia were compared to 361 controls where this event did not occur. We included 32 ART pregnancies, of which 12 were obtained through egg donations. Overall, 75% (24) of ART pregnancies experienced fetal asphyxia, suggesting ART increases the risk of fetal asphyxia by about 7 times. This finding is consistent with the literature. The pathogenesis of fetal asphyxia in ART pregnancies is currently unknown. Accordingly, this topic should be further investigated.