Using the Robson classification to assess caesarean section rates in Brazil: an observational study of more than 24 million births from 2011 to 2017

BACKGROUND

Applying the Robson classification to all births in Brazil, the objectives of our study were to estimate the rates of caesarean section delivery, assess the extent to which caesarean sections were clinically indicated, and identify variation across socioeconomic groups.

METHODS

We conducted a population-based study using routine records of the Live Births Information System in Brazil from January 1, 2011, to December 31, 2017. We calculated the relative size of each Robson group; the caesarean section rate; and the contribution to the overall caesarean section rate. We categorised Brazilian municipalities using the Human Development Index to explore caesarean section rates further. We estimated the time trend in caesarean section rates.

RESULTS

The rate of caesarean sections was higher in older and more educated women. Prelabour caesarean sections accounted for more than 54 % of all caesarean deliveries. Women with a previous caesarean section (Group 5) made up the largest group (21.7 %). Groups 6-9, for whom caesarean sections would be indicated in most cases, all had caesarean section rates above 82 %, as did Group 5. The caesarean section rates were higher in municipalities with a higher HDI. The general Brazilian caesarean section rate remained stable during the study period.

CONCLUSIONS

Brazil is a country with one of the world's highest caesarean section rates. This nationwide population-based study provides the evidence needed to inform efforts to improve the provision of clinically indicated caesarean sections. Our results showed that caesarean section rates were lower among lower socioeconomic groups even when clinically indicated, suggesting sub-optimal access to surgical care.

Weight shapes the intestinal microbiome in preterm infants: results of a prospective observational study

BACKGROUND

The intestinal microbiome in preterm infants differs markedly from term infants. It is unclear whether the microbiome develops over time according to infant specific factors.

METHODS

We analysed (clinical) metadata - to identify the main factors influencing the microbiome composition development - and the first meconium and faecal samples til the 4th week via 16 S rRNA amplican sequencing.

RESULTS

We included 41 infants (gestational age 25-30 weeks; birth weight 430-990 g. Birth via Caesarean section (CS) was associated with placental insufficiency during pregnancy and lower BW. In meconium samples and in samples from weeks 2 and 3 the abundance of Escherichia and Bacteroides (maternal faecal representatives) were associated with vaginal delivery while Staphylococcus (skin microbiome representative) was associated with CS. Secondly, irrespective of the week of sampling or the mode of birth, a transition was observed as children children gradually increased in weight from a microbiome dominated by Staphylococcus (Bacilli) towards a microbiome dominated by Enterobacteriaceae (Gammaproteobacteria).

CONCLUSIONS

Our data show that the mode of delivery affects the meconium microbiome composition. They also suggest that the weight of the infant at the time of sampling is a better predictor for the stage of progression of the intestinal microbiome development/maturation than postconceptional age as it less confounded by various infant-specific factors.

Maternal and perinatal outcomes in women with eclampsia by mode of delivery at Riley mother baby hospital: a longitudinal case-series study

Background

Eclampsia, considered as serious complication of preeclampsia, remains a life-threatening condition among pregnant women. It accounts for 12% of maternal deaths and 16–31% of perinatal deaths worldwide. Most deaths from eclampsia occurred in resource-limited settings of sub-Saharan Africa. This study was performed to determine the optimum mode of delivery, as well as factors associated with the mode of delivery, in women admitted with eclampsia at Riley Mother and Baby Hospital.

Methods

This was a hospital-based longitudinal case-series study conducted at the largest and busiest obstetric unit of the tertiary hospital of western Kenya. Maternal and perinatal variables, such as age, parity, medications, initiation of labour, mode of delivery, admission to the intensive care unit, admission to the newborn care unit, organ injuries, and mortality, were analysed using the Statistical Package for the Social Sciences software version 20.0. Quantitative data were described using frequencies and percentages. The significance of the obtained results was judged at the 5% level. The chi-square test was used for categorical variables, and Fisher’s exact test or the Monte Carlo correction was used for correction of the chi-square test when more than 20% of the cells had an expected count of less than 5.

Results

During the study period, 53 patients diagnosed with eclampsia were treated and followed up to 6 weeks postpartum. There was zero maternal mortality; however, perinatal mortality was reported in 9.4%. Parity was statistically associated with an increased odds of adverse perinatal outcomes (p = 0.004, OR = 9.1, 95% CI = 2.0–40.8) and caesarean delivery (p = 0.020, OR = 4.7, 95% CI = 1.3–17.1). In addition, the induction of labour decreased the risk of adverse outcomes (p = 0.232, OR = 0.3, 95% CI = 0.1–2.0).

Conclusion

There is no benefit of emergency caesarean section for women with eclampsia. This study showed that induction of labour and vaginal delivery can be successfully achieved in pregnant women with eclampsia. Maternal and perinatal mortality from eclampsia can be prevented through prompt and effective care.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12884-021-03875-6.

Postpartum voiding dysfunction following vaginal versus caesarean delivery

In this prospective study, we evaluated postpartum voiding dysfunction stratified by mode of delivery - vaginal delivery versus elective caesarean delivery (CD). We recruited nulliparous women carrying singleton gestation at term admitted to delivery room or elective CD. Pre-labour voiding function was assessed by recording the post-voiding residual volume (PVRV) using a bladder scan. PVRV evaluation was repeated at least 12 hours following delivery and before discharge. PVRVs were considered abnormal if ≥150 mL. PVRVs were compared between vaginal and CD. Overall, 54 women were included. Of them, 34 (63%) delivered vaginally and 20 (37%) had an elective CD. Postpartum mean PVRVs were significantly higher compared to pre-labour PVRVs (215 vs. 133 mL, p<.001). Abnormal postpartum PVRV was significantly higher in vaginal delivery compared to CD (73.5% vs. 45%, p<.05). In conclusion, delivery adversely affects voiding function. Vaginal delivery is associated with more severe voiding dysfunction compared to elective CD.Impact StatementWhat is already known on this subject? Delivery is associated with voiding dysfunction. While most studies on postpartum voiding dysfunction were related to vaginal delivery, little is known on the effect of mode of delivery (vaginal versus caesarean delivery (CD)) on voiding dysfunction.What the results of this study add? In this study, we found that postpartum post-voiding residual volume is significantly higher than the pre-labour PVRV in women delivered vaginally. In addition, postpartum PVRV was significantly higher in women delivered vaginally compared to elective CD.What the implications are of these findings for clinical practice and/or further research? This study implicates that women with vaginal delivery are more prone to voiding dysfunction compared to elective CD. However, larger observational studies are warranted to confirm these results and evaluate whether this difference still exists beyond the post-partum period.

Informal coercion during childbirth: risk factors and prevalence estimates from a nationwide survey of women in Switzerland

BACKGROUND

In many countries, the increase in facility births is accompanied by a high rate of obstetric interventions. Lower birthrates or elevated risk factors such as women's higher age at childbirth and an increased need for control and security cannot entirely explain this rise in obstetric interventions. Another possible factor is that women are coerced to agree to interventions, but the prevalence of coercive interventions in Switzerland is unknown.

METHODS

In a nationwide cross-sectional online survey, we assessed the prevalence of informal coercion during childbirth, women's satisfaction with childbirth, and the prevalence of women at risk of postpartum depression. Women aged 18 years or older who had given birth in Switzerland within the previous 12 months were recruited online through Facebook ads or through various offline channels. We used multivariable logistic regression to estimate the risk ratios associated with multiple individual and contextual factors.

RESULTS

In total, 6054 women completed the questionnaire (a dropout rate of 16.2%). An estimated 26.7% of women experienced some form of informal coercion during childbirth. As compared to vaginal delivery, cesarean section (CS) and instrumental vaginal birth were associated with an increased risk of informal coercion (planned CS risk ratio [RR]: 1.52, 95% confidence interval [1.18,1.96]; unplanned CS RR: 1.92 [1.61,2.28]; emergency CS RR: 2.10 [1.71,2.58]; instrumental vaginal birth RR: 2.17 [1.85,2.55]). Additionally, migrant women (RR: 1.45 [1.26,1.66]) and women for whom a self-determined vaginal birth was more important (RR: 1.15 [1.06,1.24]) more often reported informal coercion. Emergency cesarean section (RR: 1.32 [1.08,1.62]), being transferred to hospital (RR: 1.33 [1.11,1.60]), and experiencing informal coercion (RR: 1.35 [1.19,1.54]) were all associated with a higher risk of postpartum depression. Finally, women who had a non-instrumental vaginal birth reported higher satisfaction with childbirth while women who experienced informal coercion reported lower satisfaction.

CONCLUSIONS

One in four women experience informal coercion during childbirth, and this experience is associated with a higher risk of postpartum depression and lower satisfaction with childbirth. To prevent traumatic after-effects, health care professionals should make every effort to prevent informal coercion and to ensure sensitive aftercare for all new mothers.

Influence of Gestational Age and Mode of Delivery on Neonatal Outcomes in Prenatally Diagnosed Isolated Congenital Diaphragmatic Hernia

AIM

The optimal gestational age (GA) at delivery and mode of delivery (MoD) for pregnancies with fetal congenital diaphragmatic hernia (CDH) is undetermined. The impact of early term (37-38 weeks 6 days) versus full term (39-40 weeks 6 days) and MoD on immediate neonatal outcomes in prenatally diagnosed isolated CDH cases was evaluated.

MATERIAL AND METHODS

A retrospective chart review of pregnancies evaluated and delivered with the prenatal diagnosis of CDH between July 1, 2008, and December 31, 2018. The primary outcome was survival to hospital discharge. Secondary outcomes included neonatal intensive care unit (NICU) length of stay (LOS), extracorporeal membrane oxygenation (ECMO) requirement and need for supplemental oxygen at day 30 of life.

RESULTS

A total of 296 patients were prenatally evaluated for CDH and delivered in a single center during the study period. After applying exclusion criteria, data were available on 113 women who delivered early term and 72 women who delivered full term. Survival to hospital discharge was comparable between the 2 groups - 83.2% in the early term versus 93.1% in the full term (p = 0.07; 95% CI of 0.13-1.04). No difference was observed in any other secondary outcomes. MoD was stratified into spontaneous vaginal, induced vaginal, unplanned cesarean and scheduled cesarean delivery with associated neonatal survival rates of 74.2, 90.6, 89.7 and 88.2%, respectively, p = 0.13. The 5-min Apgar score was higher in the elective cesarean group (7.94) followed by the induced vaginal delivery group (7.8) compared to 7.17 and 7.18 in the spontaneous vaginal and unplanned cesarean groups, respectively (p = 0.03). The GA and MoD did not influence survival to hospital discharge nor NICU LOS in multivariate analysis.

CONCLUSIONS

Though there were no significant differences in neonatal outcomes for early term compared to full term deliveries of CDH neonates, a trend toward improved survival rates and lower ECMO requirements in the full term group may suggest an underlying importance GA at delivery. Further studies are warranted to validate these findings.

An ultrasound observation study on the levator hiatus with or without diastasis recti abdominis in postpartum women

INTRODUCTION AND HYPOTHESIS

We hypothesized that differences in post-partum levator hiatus (LH) measurements, as well as the area of urethra and bladder (AUB), viewed under ultrasound, correlate with diastasis rectus abdominis (DRA) occurrence. The primary objective of this study is to determine ultrasound parameters available for diagnosing DRA in post-partum women. We compared LH and AUB measurements under ultrasound in primiparous women, with and without DRA, at 24-26 weeks postpartum.

METHODS

One hundred ninety-four women underwent routine examination, including a self-made clinical symptoms questionnaire, DRA evaluation, and LH and AUB measurements. Independent samples t- and chi-squared tests were used to compare the differences between women with and without DRA.

RESULTS

DRA incidence was significantly higher among those who underwent cesarean section (CS) than for vaginal delivery (VD) (P = 0.038). DRA patients could potentially have urinary urgency, frequency, pain, dysuria, and perineal tears. Additionally, statistically significant differences were found between VD patients, with or without DRA, in the resting LH transverse diameter (TrD) (P = 0.032) and the area of the levator hiatus (ALH) (P = 0.048) as well as AUB at Valsalva (P = 0.049). No differences, however, were found between the DRA and no DRA groups for all those measurements among women who had cesarean deliveries.

CONCLUSIONS

DRA was more likely in post-CS women. Furthermore, the results showed a plausible association between DRA occurrence and LH expansion, especially in women with VD under rest and Valsalva. This could be useful for developing therapeutic plans based on these parameters for post-partum rehabilitation of women with DRA to avoid long-term complications.

Association of term isolated microcephaly with mode of delivery and perinatal outcome - a retrospective case-control analysis

Background

We aimed to evaluate the association of isolated fetal microcephaly measured by ultrasound prior to delivery at term with mode of delivery and perinatal outcome.

Methods

A single-center retrospective study was conducted in 2012–2016. Fetal microcephaly was defined as head circumference > 2 standard deviations of the mean for gestational age and sex. We compared the obstetric, delivery, and outcome parameters of women in whom ultrasound performed up to 10 days prior to term delivery showed isolated fetal microcephaly (study group) or normal head circumference (reference group). Exclusion criteria were intrauterine fetal death, birthweight below the 10th percentile, and antepartum cesarean delivery for any indication.

Results

Of 3677 women included in the study, 26 (0.7%) had a late ultrasound finding of isolated fetal microcephaly. Baseline characteristics were similar in the two groups except for estimated fetal weight based on abdominal circumference and biparietal diameter, which was lower in the microcephaly group (3209.8 ± 557.6 vs. 2685.8 ± 420.8 g, p < .001). There was no significant between-group difference in rate of vaginal operative deliveries (11.7% vs 14.8%, respectively, p = 0.372). The study group had no intrapartum cesarean deliveries compared to 6.3% of the reference group (NS). Compared to controls, neonates in the study group were smaller (3323.2 ± 432.2 vs. 2957.0 ± 330.4 g, p < .001), with lower birthweight percentile (60.5 ± 26.5 vs. 33.6 ± 21.5%, p < .001) and were more often males (48.2 vs. 90.0%, p < .001). No significant differences were noted in perinatal outcomes between the groups, including admission to neonatal intensive care unit, intraventricular hemorrhage, 5-min Apgar score < 7, asphyxia, seizures, and sepsis.

Conclusions

Isolated microcephaly in term fetuses is not advantageous for a vaginal delivery, nor does it does not pose a greater than normal risk of adverse perinatal outcome.

Mode of Delivery Does Not Affect the Risk of Inflammatory Bowel Disease

BACKGROUND

Recent evidence suggests that exposures in early life that are known to influence microbiome development may affect the risk of developing inflammatory bowel disease (IBD). Cesarean section has been associated with altered colonization of commensal gut flora and is thought to predispose to immune-mediated diseases later in life.

AIMS

To evaluate the risk of IBD, Crohn's Disease (CD), and Ulcerative Colitis (UC) according to mode of delivery (C-section vs vaginal delivery).

METHODS

A systematic search was performed in PubMed and Embase. The primary outcome was the risk of IBD in individuals delivered vaginally compared to those born by C-section. Secondary outcomes were UC and CD risk according to mode of delivery and IBD risk in individuals born by emergent compared to elective C-section. Publication bias was evaluated by funnel plots and Egger's test. Study's quality was characterized using the Newcastle-Ottawa Scale.

RESULTS

Ten studies fulfilled the inclusion criteria, of which seven were population-based. No publication bias was detected. Overall, 14.164 IBD patients and 4.206.763 controls were included. Being born by C-section was not associated with increased risk of IBD [OR 1.01, 95% CI (0.81-1.27), p = 0.92], CD [OR 1.15, 95% CI (0.94-1.42), p = 0.18] or UC [OR 0.94, 95% CI (0.61-1.45), p = 0.79]. No differences were found between emergent and elective C-section in IBD [OR 1.05, 95% CI (0.59-1,87), p = 0.87]. Substantial heterogeneity was found in statistical analysis, and further studies are needed.

CONCLUSION

Overall, the risk of developing IBD was not affected by mode of delivery.

Effects of Midwifery Care on Mode of Delivery, Duration of Labor and Postpartum Hemorrhage of Elderly Parturients

Background:

We aimed to explore the influence of midwifery care on the mode of delivery (MOD), duration of labor and postpartum hemorrhage (PPH) of elderly parturients.

Methods:

A total of 165 elderly parturients admitted to Tongde Hospital of Zhejiang Province, China from May 2018 to Aug 2019 were allocated into a study group (n=85, midwifery care) and a control group (n=80, conventional nursing care). Visual analogue scale (VAS) was employed to estimate the pain of parturients, and self-rating anxiety scale (SAS) and self-rating depression scale (SDS) were employed to evaluate the anxiety and depression status. The satisfaction of patients on nursing care was scored by a self-made satisfaction questionnaire.

Results:

The parturients in the study group presented higher spontaneous vaginal delivery (SVD) rate (P < 0.05), and had shortened duration of first and second stages of labor and total duration of labor (P < 0.05). The incidence of both PPH and neonatal asphyxia in the study group was lower than that in the control group (both P < 0.05). The VAS, SAS and SDS scores in the study group were significantly lower than those in the control group (P < 0.05), and the patients’ satisfaction in the study group was significantly higher (P < 0.05).

Conclusion:

Midwifery care is effective for the delivery of elderly parturients, which significantly improves VSD rate, shortens duration of labor, reduces incidence of PPH and neonatal asphyxia, as well as relives labor pain, anxiety and depression, and increases satisfaction of parturients.

Clinical characteristics influence cultivable-bacteria composition in the meconium of Indonesian neonates

Background

Microbial colonization of a neonate's gastrointestinal tract has significant perinatal and lifetime health consequences. However, information regarding the profile of meconium microbiota in neonates and the influence of clinical parameters are lacking in the Indonesian population. This study aimed to preliminary investigate the profile of cultivable bacterial diversity of meconium isolated from neonates born at Cipto Mangunkusumo Hospital (CMH), Jakarta. The cultivable bacteria were isolated from meconium samples and were then processed for cultivation and molecular identification.

Results

Fourteen neonates were enrolled as described, i.e., seven hyperbilirubinemia (Hyp) and seven non-Hyp with ten neonates delivered by cesarean section (CS) and four others by vaginal route (VR), and with five exclusive breastfeeding (Ebf), four formula milk, and five combinations. Microbiological identification, molecular 16S rDNA PCR-Sanger sequencing, and PCA analysis of cultivable bacteria isolated from meconium showed Firmicutes' predominance (84.41%), with an abundant population of Staphylococcus, which consist of S. hominis, S. epidermidis, and S. haemolyticus. The influence of mode of delivery showed a lower diversity than the CS populates the VR, but their composition was similar. Concurrently, between feeding patterns, the genera profile did not show much difference; in the non-Ebf group, the total amount of Staphylococcus and Bacillus showed a higher amount but a less diverse. Interestingly, the non-Hyp group showed more abundant and diverse Staphylococcus than that of the Hyp group. In contrast, neonates diagnosed with NEC and proven sepsis showed the same pattern of Staphylococcus domination.

Conclusion

Staphylococcus predominated the composition of cultivable bacteria in neonates meconium. Due to the small sample size, only the hyperbilirubinemia parameter significantly influenced the profile, i.e., Staphylococcus's proportion (p = 0.037).

Effect of a subsequent pregnancy on anal sphincter integrity and function after obstetric anal sphincter injury (OASI)

Introduction and hypothesis

Endoanal ultrasound (EAUS) and anal manometry are used in the assessment women with a history of obstetric anal sphincter injury (OASI), both postpartum and in a subsequent pregnancy, to aid counselling regarding mode of delivery (MOD).

Methods

A prospective observational study between 2012 to 2020 was completed. Women were reviewed 3 months postpartum following OASI and in the second half of a subsequent pregnancy. Anorectal symptoms were measured using the validated St Mark’s Incontinence Score (SMIS: asymptomatic to mild symptoms = ≤ 4). Anal manometry (incremental maximum squeeze pressure [iMSP: normal = > 20 mmHg]) and EAUS (abnormal = sphincter defect > 1 h in size) were performed.

Results

One hundred forty-six women were identified and 67.8% had an anal sphincter defect ≤ 1 h in size postnatally. In those with a defect ≤ 1 h, postpartum mean iMSP and SMIS significantly improved in a subsequent pregnancy (p = 0.04 and p = 0.01, respectively). In women with a defect > 1 h, there was no significant difference between the mean iMSP or SMIS score postnatally compared to a subsequent pregnancy. At both time points, significantly more women had an anal sphincter defect ≤ 1 h and SMIS of ≤ 4 (p = 0.001 and p < 0.001 respectively) compared to those with a defect < 1 h. In addition, significantly more women had an anal sphincter defect ≤ 1 h and iMSP ≥ 20 mmHg (p < 0.001). Overall, out of the 146 women included in this study, 76 (52.1%) with a defect ≤ 1 h also had an iMSP ≥ 20 mmHg and SMIS ≤ 4 at 3 months postpartum.

Conclusions

Women who remain asymptomatic with normal anal manometry and no abnormal sphincter defects on EAUS postnatally do not need to have these investigations repeated in a subsequent pregnancy and can be recommended to have a vaginal delivery. If our protocol was modified, over half of the women in this study could have had their MOD recommendation made in the postnatal period alone.

Optimizing Term Delivery and Mode of Delivery

Full-term deliveries are defined as occurring between 39 weeks and 40 weeks and 6 days. Because contemporary research suggests improved outcomes with delivery in the term period compared with the early term period, nonindicated delivery should be pursued no earlier than 39 weeks. There are, however, multiple medical, obstetric, and fetal indications for delivery before 39 weeks, and the obstetric provider must weigh the risks and benefits of delivery versus expectant management on both the mother and fetus. This review serves to provide a basic framework of evidentiary support toward optimizing the term delivery.

Use of Cesarean Birth at Mizan Tepi University Teaching Hospital, Mizan Aman, Ethiopia

OBJECTIVES

The objective of this analysis was to review indication and utilization of cesarean birth among Robson Classification of Cesarean Birth subgroups.

METHODS

This study was a prospective hospital-based cross-sectional analysis of a convenience sample of 1,000 women who delivered Mizan Tepi University Teaching Hospital in the summer and fall of 2019.

RESULTS

Data on mode of delivery was available for 993 women, 23.4% of which underwent cesarean birth. The leading indication for cesarean birth was a fetal indication (46.2%), followed by a maternal indication (35.9%); elective cesarean birth was the indication for one cesarean birth. Robson Groups 1 and 3 (primary cesarean among nulliparous and multiparous women) accounted for the largest proportion of the overall population of women (30.2% and 36.8%), and cesarean birth rates within these groups were 19.4% and 16.1%, respectively. In all remaining groups, cesarean birth rates were at least 17.1%, ranging to as high as 100.0%. Pre-labor cesarean was highest in Robson Group 5 (multiparous women with a history of cesarean birth).

CONCLUSION

Further analysis of risk factors associated with cesarean birth in women whose labor was induced or augmented, or those undergoing preterm birth, might offer additional target risk factors to modify.

Preference for mode of delivery in a low-risk population in Cape Town, South Africa

OBJECTIVES

There has been an increase in Caesarean section rates in many developed countries with maternal request frequently being cited as a reason. There are few studies examining African women's preference for mode of delivery. The objectives this study were to determine women's preference for mode of delivery in a low risk population to describe the major reasons for their preferences.

STUDY DESIGN

Women over the age of 18 with a singleton low risk pregnancy were recruited during the third trimester. Two trained interviewers conducted a questionnaire in the women's preferred language regarding her preference for mode of delivery.

RESULTS

Of the 195 women that participated, 160 (82.1 %) indicated a preference for vaginal delivery, 5 (2.6 %) preferred a Caesarean delivery, and 30 women (15.4 %) were unsure about their preferred mode of delivery. There was a significant association between delivery preference and age, ethnicity and HIV status. Level of education, employment, income, relationship status, and parity demonstrated no statistical association. In addition, 106 (54.4 %) did not believe that women should be given the right to request a Caesarean section.

CONCLUSION

The majority of women prefer to have a vaginal delivery. In this low risk population, 15.4 % of women were unsure about their preference.

Influence of labor on direct and indirect determinants of placental 11beta-hydroxysteroid dehydrogenase activity

Purpose

Labor is a complex process involving multiple para-, auto- and endocrine cascades. The interaction of cortisol, corticotropin-releasing hormone (CRH) and progesterone is essential. The action of cortisol on the human feto-placental unit is regulated by 11beta-hydroxysteroid dehydrogenase type 2 (11β-HSD2/HSD11B2) that converts cortisol into inactive cortisone. The majority of studies on the assessment of placental 11β-HSD2 function determined indirect activity parameters. It remains elusive if indirect measurements correlate with enzymatic function and if these parameters are affected by potential confounders (e.g., mode of delivery). Thus, we compared determinants of indirect 11β-HSD2 tissue activity with its direct enzymatic turnover rate in placental samples from spontaneous births and cesarean (C)-sections.

Methods

Using LC–MS/MS, we determined CRH, cortisol, cortisone, progesterone and 17-hydroxy(OH)-progesterone in human term placentas (spontaneous birth vs. C-section, n = 5 each) and measured the enzymatic glucocorticoid conversion rates in placental microsomes. Expression of HSD11B1, 2 and CRH was determined via qRT-PCR in the same samples.

Results

Cortisol–cortisone ratio correlated with direct microsomal enzymatic turnover. While this observation seemed independent of sampling site, a strong influence of mode of delivery on tissue steroids was observed. The mRNA expression of HSD11B2 correlated with indirect and direct cortisol turnover rates in C-section placentas only. In contrast to C-sections, CRH, cortisol and cortisone levels were significantly increased in placental samples following spontaneous birth.

Conclusion

Labor involves a series of complex hormonal processes including activation of placental CRH and glucocorticoid metabolism. This has to be taken into account when selecting human cohorts for comparative analysis of placental steroids.

Electronic supplementary material

The online version of this article (10.1007/s00404-020-05755-4) contains supplementary material, which is available to authorized users.

Successful vaginal delivery after external cephalic version (ECV): does time interval from ECV to delivery make a difference? A multicenter study

PURPOSE

The risk of cesarean delivery after a successful external cephalic version for breech presentation is higher as compared with fetuses in cephalic presentation. However, the role of the time interval between version attempt to delivery on the risk for cesarean delivery is unclear. We aimed to study the effect of the time interval from a successful external cephalic version to delivery on the risk for cesarean delivery and assess factors associated with cesarean delivery after a successful version.

METHODS

We conducted a multicenter, retrospective cohort study, including all successful external cephalic version at two medical centers between 2011 and 2019. We compared patient baseline characteristics, obstetric characteristics, maternal and neonatal outcomes in women that delivered by vaginal delivery with those who delivered by cesarean delivery.

RESULTS

Overall, 769 deliveries were included. Of these, 98 women (12.7%) had cesarean delivery and 671 (87.3%) had vaginal delivery. Women who had cesarean delivery had a higher rate of obesity (44.9% vs 21.9%, p < 0.001; OR 2.88, CI 1.65-5.03) and nulliparity (45.9% vs 24.5%, p < 0.001; OR = 2.58, CI 1.67-3.98). The risk for intrapartum cesarean delivery did not differ according to time interval from external cephalic version to delivery.

CONCLUSIONS

The time interval between successful external cephalic version and delivery was not associated with mode of delivery. This finding is in contrast to previous reports. The risk for cesarean delivery after successful version is higher in nulliparous, obese women, and women whose weight gain in pregnancy was higher.

Impact of implementation of a breech clinic in a tertiary hospital

BACKGROUND

The incidence of breech presentation in single pregnancies at term is between three to 5 %. In order to support eligible women in their choice of mode of delivery, a dedicated breech clinic with a care pathway was developed in December 2015 in a tertiary referral centre in Brussels. The primary objective of this study was to evaluate the vaginal birth rate before and after the introduction of a dedicated breech clinic. The secondary objective was to compare the early neonatal outcomes before and after the breech clinic was introduced.

METHODS

This was a single centre retrospective and prospective study. The inclusion criteria were term (from 37 weeks), singleton fetus and breech presentation at delivery. The exclusion criteria were suspected intrauterine growth restriction, severe fetal malformations and intrauterine fetal demise. We used a composite outcome as an indicator of neonatal morbidity and mortality.

RESULTS

After the introduction of the breech clinic, we observed a significant increase in planned vaginal delivery from 7.4% (12/162) to 53.0% (61/115) (OR: 13.5; 95% CI: 6.7-27.0). The effective vaginal breech delivery rate (planned and unexpected) significantly increased from 4.3% (7/162) pre-implementation of breech clinic to 43.5% (50/115) post-implementation (OR: 17.0; 95% CI: 7.3-39.6). Neonatal outcomes were not statistically different between the before and after periods.

CONCLUSION

The introduction of a dedicated breech clinic has led to an increase in vaginal deliveries for breech babies without adversely affecting neonatal outcomes.

Examining the relationship between maternal body size, gestational glucose tolerance status, mode of delivery and ethnicity on human milk microbiota at three months post-partum

BACKGROUND

Few studies have examined how maternal body mass index (BMI), mode of delivery and ethnicity affect the microbial composition of human milk and none have examined associations with maternal metabolic status. Given the high prevalence of maternal adiposity and impaired glucose metabolism, we systematically investigated the associations between these maternal factors in women ≥20 years and milk microbial composition and predicted functionality by V4-16S ribosomal RNA gene sequencing (NCT01405547;  https://clinicaltrials.gov/ct2/show/NCT01405547 ). Demographic data, weight, height, and a 3-h oral glucose tolerance test were gathered at 30 (95% CI: 25-33) weeks gestation, and milk samples were collected at 3 months post-partum (n = 113).

RESULTS

Multivariable linear regression analyses demonstrated no significant associations between maternal characteristics (maternal BMI [pre-pregnancy, 3 months post-partum], glucose tolerance, mode of delivery and ethnicity) and milk microbiota alpha-diversity; however, pre-pregnancy BMI was associated with human milk microbiota beta-diversity (Bray-Curtis R² = 0.037). Women with a pre-pregnancy BMI > 30 kg/m² (obese) had a greater incidence of Bacteroidetes (incidence rate ratio [IRR]: 3.70 [95% CI: 1.61-8.48]) and a reduced incidence of Proteobacteria (0.62 [0.43-0.90]) in their milk, compared to women with an overweight BMI (25.0-29.9 kg/m²) as assessed by multivariable Poisson regression. An increased incidence of Gemella was observed among mothers with gestational diabetes who had an overweight BMI versus healthy range BMI (5.96 [1.85-19.21]). An increased incidence of Gemella was also observed among mothers with impaired glucose tolerance with an obese BMI versus mothers with a healthy range BMI (4.04 [1.63-10.01]). An increased incidence of Brevundimonas (16.70 [5.99-46.57]) was found in the milk of women who underwent an unscheduled C-section versus vaginal delivery. Lastly, functional gene inference demonstrated that pre-pregnancy obesity was associated with an increased abundance of genes encoding for the biosynthesis of secondary metabolites pathway in milk (coefficient = 0.0024, P_FDR < 0.1).

CONCLUSIONS

Human milk has a diverse microbiota of which its diversity and differential abundance appear associated with maternal BMI, glucose tolerance status, mode of delivery, and ethnicity. Further research is warranted to determine whether this variability in the milk microbiota impacts colonization of the infant gut.

Vacuum extraction in twin deliveries-maternal and neonatal consequences: a retrospective cohort study

PURPOSE

To establish the frequency of vacuum extraction among parturients with twin pregnancies, identify the risk factors and perinatal outcomes.

METHODS

A retrospective cohort database study was conducted between 2005-2018. Twin fetuses with vertex presentation >34 weeks gestation who achieved vaginal delivery were included. Outcomes were compared between neonates who were delivered by vacuum extraction and neonates delivered by spontaneous vaginal delivery (aORs; [95% CI]).

RESULTS

A total of 1751 neonates of 905 parturients with twin pregnancies met inclusion criteria, of which 163 (18%) parturients had vacuum extraction and 225 (12.8%) neonates were delivered by vacuum extraction. The most significant risk factors for vacuum extraction were primiparity (6.79 [4.77-9.66]), previous cesarean delivery (5.59 [3.13-9.97]), and epidural analgesia (4.34 [1.83-10.31]). Vacuum extractions were associated with a spectrum of adverse maternal outcomes (2.60 [1.61-4.19]), particularly postpartum hemorrhage and its associated morbidities. From the neonatal aspect, vacuum extraction deliveries were associated with a composite of birth trauma injuries (21.81 [6.43-73.91]).

CONCLUSION

Vacuum extractions among twin pregnancies were found to be associated with significantly higher rates of postpartum hemorrhage, blood transfusion, and perinatal birth trauma. These findings should be presented to women when counseling on mode of delivery and considered individually against cesarean delivery disadvantages.

How to reduce the potential risk of vertical transmission of SARS-CoV-2 during vaginal delivery?

The risk of vertical transmission during vaginal delivery in COVID-19 pregnant patients is currently a topic of debate. Obstetric norms on vaginal birth assistance to reduce the potential risk of perinatal infection should be promoted by ensuring that the risk of contamination from maternal anus and faecal material is reduced during vaginal delivery.

Timing and mode of delivery with advancing maternal age

In 2017, 23% of all live births in the United Kingdom were to women aged over 35 years. Decisions around the timing of delivery for such women must balance the risks of prolongation of the pregnancy and of iatrogenic harm from timed delivery. Women of advanced maternal age have a small age-related elevated risk of term stillbirth. Antenatal monitoring and the route of delivery should not differ from those for younger women. The induction of labour at 39 weeks for such women does not appear to increase the risk of emergency caesarean section or to have any short-term adverse effects on mother or baby. There have been no studies on the long-term effects of induction in this group. Nevertheless, it seems reasonable to offer women of advanced maternal age, induction of labour at 39 weeks where resources are available to safely provide this.

Management of subsequent pregnancies following fourth-degree obstetric anal sphincter injuries (OASIS)

OBJECTIVES

The management of subsequent pregnancy in women who sustained OASIS remains an enigma. Nearly all studies include all grades of OASIS including fourth-degree tears. In addition, most protocols require endoanal ultrasound and anal manometric assessment to provide advice regarding mode of delivery. In reality, most women who sustain an OASI do not undergo these investigations. The aims of our study were firstly to evaluate outcomes of fourth-degree OASIS in terms of sphincter defects, anal manometry and anal incontinence symptoms. Secondly, we wished to review recommendations made regarding subsequent mode of delivery after fourth-degree OASIS according to different published protocols.

STUDY DESIGN

An observational study of all women who had undergone a primary repair of a fourth-degree tear and seen in the perineal clinic of a tertiary urogynaecology unit between January 2006 and December 2017. Three-dimensional endoanal ultrasound and anal manometry were performed on all women, and symptoms assessed using the validated modified St Mark's Score for anal incontinence. Diagnostic test accuracy analysis was performed for use of symptoms in predicting abnormal investigations.

RESULTS

74 fourth-degree tears were identified (mean follow-up 5.9 months; SD 11.5). Endoanal scan showed an internal anal sphincter defect in 77 % and an external anal sphincter defect in 49 %. Only 18 % had no defect. The mean incremental pressure rise was 12.6 mmHg (SD 15.5). 61 % were asymptomatic with a mean St Mark's Score of 3.8 (SD 5.4). The presence of symptoms alone had poor accuracy in predicting abnormal investigations. Based on Royal College of Obstetricians and Gynaecologists guidance, only 7% would not be offered a caesarean section as they are asymptomatic women with normal scan and manometry findings and would be counselled for a vaginal delivery.

CONCLUSIONS

Given that only a few units offer these specialist investigations to their OASI population, it would be reasonable to offer caesarean section to all women who have sustained a fourth-degree tear. However, in centres where endoanal ultrasound and anal manometry are available, individualised counselling can be offered.

Fertility intentions and the way they change following birth- a prospective longitudinal study

BACKGROUND

Women's fertility intentions, their desired number of children and desired inter-pregnancy interval (IPI) are related to micro (personal) and macro (socio-cultural) level factors. We investigated factors that contribute to changes in women's fertility intentions in Israel, a developed country with high birth rates.

METHODS

Pregnant women (N = 1163), recruited from prenatal clinics and hospitals in two major metropolitan areas, completed self-report questionnaires prenatally (≥24 weeks gestation) and postpartum (2 months after childbirth). Women reported their socio-demographic background and obstetric history prenatally, their desired number of children and IPI at both time-points, and their objective and subjective birth experiences postpartum.

RESULTS

The findings indicated that background characteristics were related to prenatal fertility intentions. The strongest contributor to prenatal fertility intentions was women's degree of religiosity- the more religious they were, the more children they desired and the shorter their intended IPI. Women's postpartum fertility intentions were mostly consistent with their prenatal reports. In regression models, women who were very-religious, more educated and had previously given birth were less likely to report a lower number of desired of children at postpartum, compared to their prenatal report. Women who reported greater birth satisfaction and gave birth for the first time were less likely to change desired IPI.

CONCLUSION

Having a negative birth experience could adversely affect women's fertility intentions. Yet, in a pronatalist and medicalized birth culture, social pressures may decrease the effects of birth experiences on fertility intentions.

Prenatal and postnatal determinants in shaping offspring's microbiome in the first 1000 days: study protocol and preliminary results at one month of life

BACKGROUND

Fetal programming during in utero life defines the set point of physiological and metabolic responses that lead into adulthood; events happening in "the first 1,000 days" (from conception to 2-years of age), play a role in the development of non-communicable diseases (NCDs). The infant gut microbiome is a highly dynamic organ, which is sensitive to maternal and environmental factors and is one of the elements driving intergenerational NCDs' transmission. The A.MA.MI (Alimentazione MAmma e bambino nei primi MIlle giorni) project aims at investigating the correlation between several factors, from conception to the first year of life, and infant gut microbiome composition. We described the study design of the A.MA.MI study and presented some preliminary results.

METHODS

A.MA.MI is a longitudinal, prospective, observational study conducted on a group of mother-infant pairs (n = 60) attending the Neonatal Unit, Fondazione IRCCS Policlinico San Matteo, Pavia (Italy). The study was planned to provide data collected at T0, T1, T2 and T3, respectively before discharge, 1,6 and 12 months after birth. Maternal and infant anthropometric measurements were assessed at each time. Other variables evaluated were: pre-pregnancy/gestational weight status (T0), maternal dietary habits/physical activity (T1-T3); infant medical history, type of feeding, antibiotics/probiotics/supplements use, environment exposures (e.g cigarette smoking, pets, environmental temperature) (T1-T3). Infant stool samples were planned to be collected at each time and analyzed using metagenomics 16S ribosomal RNA gene sequence-based methods.

RESULTS

Birth mode (cesarean section vs. vaginal delivery) and maternal pre pregnancy BMI (BMI < 25 Kg/m² vs. BMI ≥ 25 Kg/m²), significant differences were found at genera and species levels (T0). Concerning type of feeding (breastfed vs. formula-fed), gut microbiota composition differed significantly at genus and species level (T1).

CONCLUSION

These preliminary and explorative results confirmed that pre-pregnancy, mode of delivery and infant factors likely impact infant microbiota composition at different levels.

TRIAL REGISTRATION

ClinicalTrials.gov identifier: NCT04122612.