A randomized controlled trial reducing cesarean delivery rates in China by introducing trial of labor after cesarean and electrohysterography

OBJECTIVE

A cesarean delivery (CD) can affect health of both mother and child and future pregnancies. Since the abandonment of the one-child policy in China, obstetricians tend to perform a repeat CD rather than a trial of labor after cesarean (TOLAC). This study aims to reduce CD rates by increasing vaginal births after cesarean (VBAC) rates and introducing electrohysterography (EHG) for accurate monitoring.

METHODS

In total, 82 women received counseling regarding TOLAC at the Shijiazhuang Sixth Hospital in China. Women opting for TOLAC were randomized for either external tocodynamometry (TOCO, i.e. standard care) or EHG. The primary outcome was the VBAC rate. Secondary outcomes were indications for CD, percentage of assisted vaginal deliveries, labor duration, maternal blood loss, complications and neonatal outcomes.

RESULTS

After accounting for preterm delivery and dropouts, all counseled women opted for a TOLAC (100%). After randomization, 42 women were included in the TOCO-group and 37 in the EHG-group. Women did not receive pain medication and labor was not augmented with oxytocin. The VBAC rate was 71.4% in the TOCO-group, versus 78.4% in the EHG-group (p = .48). Birth was assisted with forceps in 11.9% of TOCO-group versus 2.7% of EHG-group (p = .21). One secondary CD (i.e. a shift from intended vaginal delivery to surgical delivery within the same labor) was performed because of a suspicion of uterine rupture (TOCO-group). Other indications for CD were: fetal distress, labor dystocia, fetal position, cephalopelvic disproportion. There were no significant differences in secondary study outcomes. No complications were reported.

CONCLUSION

This study showed an average VBAC rate of 75%, without any complications, in a hospital with no previous experience with TOLAC. The VBAC rate with EHG-monitoring was higher than TOCO, although this difference was not significant. To demonstrate a significant difference, larger clinical studies are necessary.

TRIAL REGISTRATION

The Daily Board of the Medical Ethics Committee of The Maternal and Child Hospital of Shijiazhuang approved the study protocol (number 20171018, Dutch Trial Register NL8199).

Balancing Maternal Melanoma and Vaginal Birth After Cesarean (VBAC) Delivery: A Case Report Highlighting Shared Decision-Making

Melanoma is increasingly common among reproductive-age women and is one of the most common cancers diagnosed during pregnancy. The literature for melanoma in pregnancy, especially among those with prior uterine scars, is limited. We present an interesting case of a 22-year-old woman who went to her dermatologist for a suspicious lesion on her thigh. The lesion was excised, and histopathology confirmed that it was a melanoma. The dermatologist recommended immediate delivery. The patient then urged her obstetrician to undergo the risks of an induction of labor (IOL) for a trial of labor after cesarean (TOLAC) because she desired a large family, and a second cesarean would make this more difficult to happen. She ultimately had a successful vaginal birth after cesarean (VBAC) and subsequent excision of the melanoma with surgical oncology in the immediate postpartum period. Therefore, the decision for IOL for TOLAC in this case was based on the patient's fears regarding melanoma disease progression in her 39th week. Given the short time course between delivery and excision of her melanoma, it is possible that she may have been able to wait for spontaneous labor, which would have avoided the risks associated with IOL for TOLAC. The optimal timing of surgical intervention for melanoma in pregnant patients who desire TOLAC is unknown. In pregnancies that are approaching their due date, waiting for spontaneous labor may be a reasonable approach to avoid the risks of labor induction, especially in women with prior cesarean delivery. A multidisciplinary approach involving dermatology, surgical oncology, and the obstetric team is warranted to optimize both dermatologic and obstetric outcomes.

Variations over time in mode of birth and perinatal outcomes in women with one previous cesarean in the Netherlands: A 20-year population-based study

BACKGROUND

Globally, cesarean birth rates are rising, and while it can be a lifesaving procedure, cesarean birth is also associated with increased maternal and perinatal risks. This study aims to describe changes over time about the mode of birth and perinatal outcomes in second-pregnancy women with one previous cesarean birth in the Netherlands over the past 20 years.

METHODS

We conducted a nationwide, population-based study using the Dutch perinatal registry. The mode of birth (intended vaginal birth after cesarean (VBAC) compared with planned cesarean birth) was assessed in all women with one previous cesarean birth and no prior vaginal birth who gave birth to a term singleton in cephalic presentation between 2000 and 2019 in the Netherlands (n = 143,146). The reported outcomes include the trend of intended VBAC, VBAC success rate, and adverse perinatal outcomes (perinatal mortality up to 7 days, low Apgar score at 5 min, asphyxia, and neonatal intensive care unit admission ≥24 h).

RESULTS

Intended VBAC decreased by 21.5% in women with one previous cesarean birth and no prior vaginal birth, from 77.2% in 2000 to 55.7% in 2019, with a marked deceleration from 2009 onwards. The VBAC success rate dropped gradually, from 71.0% to 65.3%, across the same time period. Overall, the cesarean birth rate (planned and unplanned) increased from 45.2% to 63.6%. Adverse perinatal outcomes were higher in women intending VBAC compared with those planning a cesarean birth. Perinatal mortality initially decreased but remained stable from 2009 onwards, with only minimal differences between both modes of birth.

CONCLUSIONS

In the Netherlands, the proportion of women intending VBAC after one previous cesarean birth and no prior vaginal birth has decreased markedly. Particularly from 2009 onwards, this decrease was not accompanied by a synchronous reduction in perinatal mortality.

Is vaginal birth after cesarean section a risk factor for obstetric anal sphincter injury?

OBJECTIVE

To investigate whether women undergoing their first vaginal delivery after a previous cesarean section (secundiparous) are at increased risk for obstetric anal sphincter injury (OASI) compared with primiparous women.

METHODS

A retrospective cohort study of 85 428 women who delivered vaginally over a 10-year period in a single tertiary medical center. Incidence of OASI, risk factors, and clinical characteristics were compared between primiparous women who delivered vaginally and secundiparous women who underwent their first vaginal birth after cesarean section (VBAC). A multivariable logistic regression analysis was used to study the association between VBAC and OASI.

RESULTS

Overall, 36 250 primiparous and 1602 secundiparous women were enrolled, 309 of whom had OASI. The rates of OASI were similar among secundiparous women who had VBAC and primiparous women who underwent vaginal delivery (15 [0.94%] vs 294 [0.81%], P = 0.58). The proportions of third- and fourth-degree tears were also similar among secundiparous and primiparous women who experienced OASI (87% vs 91.5%, and 13% vs 8.5%, respectively, P = 0.68). Furthermore, the rates of OASI were similar in both study groups, although secundiparous women who underwent VBAC had higher rates of birth weights exceeding 3500 g (414 [25.8%] vs 8284 [22.8%], P = 0.016), and higher rates of vacuum-assisted deliveries (338 [21%] vs 6224 [17.2%], P < 0.001). A multivariate logistic regression analysis failed to establish a statistically significant association between VBAC and OASI (odds ratio 0.672, 95% confidence interval 0.281-1.61, P = 0.37).

CONCLUSIONS

No increased risk for OASI was found in secundiparous women who underwent VBAC compared with primiparous women at their first vaginal birth.

Identifies Current Trends in Vaginal Birth after Cesarean Section in IRAN: A Qualitative Study

Background

The growing prevalence of Cesarean Sections (CS), particularly repeated CS, is a major issue in contemporary midwifery. This study seeks to gain a comprehensive understanding of the experiences of pregnant women and specialists with vaginal delivery after CS, as well as the obstacles that may arise.

Materials and Methods

From March 2020 to May 2021, 10 women, 12 midwives, and 8 obstetricians and obstetricians affiliated with Qom University of Medical Sciences were interviewed to investigate the experiences and challenges associated with Vaginal Birth After Cesarean section (VBAC). We used the content analysis method, and the sampling was purposive. Semi-structured interviews were conducted to collect data, which were then analyzed using qualitative content analysis based on conventional content analysis.

Results

The results show that subcategories "individual aspects of VBAC" and "family-social aspects of VBAC" formed "positive aspects of VBAC." Subcategories "self-efficacy" and "decision-making participation" formed the "empowerment for the woman." Subcategories "technical team challenges" and "woman's challenges" formed the main category of "upcoming challenges."

Conclusions

Positive relationships, choice-making ability, and self-confidence impact a woman's decision to choose VBAC. Informing women of alternative delivery options after a CS and pursuing their dreams increases the likelihood of successful VBAC.

Trial of labor after 2 previous cesareans: a multicenter study

BACKGROUND

Trial of labor after cesarean after 2 cesarean deliveries is linked to a lower success rate of vaginal delivery and higher rates of adverse obstetrical outcomes than trial of labor after cesarean after 1 previous cesarean delivery.

OBJECTIVE

This study aimed to investigate the factors associated with failed trial of labor after cesarean among women with 2 previous cesarean deliveries.

STUDY DESIGN

This was a multicenter retrospective cohort study, which included all women with singleton pregnancies attempting trial of labor after cesarean after 2 previous cesarean deliveries between 2003 and 2021. This study compared labor, maternal, and neonatal characteristics between women with failed trial of labor after cesarean and those with successful trial of labor after cesarean. Univariate analysis was initially performed, followed by multivariable analysis (adjusted odds ratios with 95% confidence intervals).

RESULTS

The study included a total of 1181 women attempting trial of labor after cesarean after 2 previous cesarean deliveries. Among these cases, vaginal birth after cesarean was achieved in 973 women (82.4%). Women with failed trial of labor after cesarean had higher rates of maternal and neonatal morbidities. Several factors were found to be associated with failed trial of labor after cesarean, including longer interpregnancy and interdelivery intervals, lower gravidity and parity, lower rates of previous successful vaginal delivery, smoking, earlier gestational age at delivery (38.3±2.1 vs 39.5±1.3 weeks), late preterm delivery (34-37 weeks of gestation), lower cervical dilation on admission, no use of epidural, and smaller neonatal birthweight. Our multivariable model revealed that late preterm delivery (adjusted odds ratio, 3.79; 95% confidence interval, 1.37-10.47) and cervical dilation on admission for labor <3 cm (adjusted odds ratio, 2.58; 95% confidence interval, 1.47-4.54) were associated with higher odds of failed trial of labor after cesarean.

CONCLUSION

In the investigated population of women with 2 previous cesarean deliveries undergoing trial of labor after cesarean, admission at the late preterm period with a cervical dilation of <3 cm, which reflects the latent phase, may elevate the risk of failed trial of labor after cesarean and a repeated intrapartum cesarean delivery.

Decision-making experiences and the need for decision aids in women considering vaginal birth after cesarean: A qualitative meta-synthesis

AIMS

This study aims to comprehensively explore the decision-making requirements of women contemplating vaginal birth after cesarean (VBAC).

DESIGN & METHODS

A meta-synthesis approach was employed for this study. Using an integrative methodology, we conducted a systematic assessment of women's experiences and needs related to VBAC decision-making. A comprehensive search was conducted across The Cochrane Library, PubMed, EMBASE, Ovid Medline, SCOPUS, Cumulative Index to Nursing and Allied Health Literature (CINAHL), PsycINFO, and Wan Fang databases to identify pertinent studies between 2000 and 2022. Furthermore, the reference lists of the included studies were thoroughly examined.

RESULTS

Fifteen studies were incorporated, from which seven themes emerged: emotional changes, preference for vaginal birth, unmet information needs, influences on decision-making, decision-making autonomy, aligning information provision with decision-support needs, and the requirement for support systems. Two primary syntheses were constructed on the decision-making process and the need for decision-making aids, respectively.

CONCLUSION

Women opting for VBAC experienced emotional shifts during their decision-making process in pregnancy. There remains a need for an enhanced decision-making tool to guide them in their choice. Recommendations for implementation in VBAC decision aids include facilitating women's involvement in decision-making, satisfying their information needs, and delivering appropriate emotional support.

The impact of a trial of labor after cesarean versus elective repeat cesarean delivery: A meta-analysis

BACKGROUND

The increasing global incidence of cesarean section has prompted efforts to reduce cesarean delivery rates. A trial of labor after cesarean (TOLAC) has emerged as an alternative to elective repeat cesarean delivery (ERCD) for women with a prior cesarean delivery. However, the available evidence on the comparative outcomes of these 2 options remains inconsistent, primarily due to varying advantages and risks associated with each. Our meta-analysis aims to compare the maternal-neonatal results in TOLAC and ERCD in women with prior cesarean deliveries.

METHODS

A comprehensive search was performed in PubMed, Embase, Cochrane library databases up to September,2022 to identity studies evaluating perinatal outcomes in women who underwent TOLAC compared to ERCD following a previous cesarean delivery. The included studies were subjected to meta-analysis using RevMan 5.3 software to assess the overall findings.

RESULTS

A total of 13 articles were included in this meta-analysis. Statistically significant differences were identified in the rate of uterine rupture (OR = 2.01,95%CI = 1.48-2.74, P < .00001) and APGAR score < 7 at 5 minutes (OR = 2.17,95%CI = 1.69-2.77, P < .00001) between the TOLAC and ERCD groups. However, no significant differences were observed in the rates of hysterectomy, maternal blood transfusion, postpartum infection, postpartum hemorrhage and neonatal intensive care unit (P ≥ .05) admission between the 2 groups.

CONCLUSIONS

Our analysis revealed that TOLAC is associated with a higher risk of uterine rupture and lower incidence APGAR score < 7 at 5 minutes compared to ERCD. It is vital to consider predictive factors when determining the appropriate mode of delivery in order to ensure optimal pregnancy outcomes. Efforts should be made to identify the underlying causes of adverse outcomes and implement safety precautions to select suitable participants and create safe environments for TOLAC.

Characteristics of women who underwent one or more previous cesarean sections according to Nascer no Brasil

OBJECTIVE

To descriptively analyze Brazilian parturient women who underwent previous cesarean section and point out the factors associated with Vaginal Birth After Cesarean (VBAC) in Brazil.

METHODS

The study used data from women with one, two, or three or more cesarean sections from the survey Nascer no Brasil (Birth in Brazil). Differences between categories were assessed through the chi-square test (χ2). Variables with significant differences (p < 0.05) were incorporated into logistic regression.

FINDINGS

Out of the total of 23,894 women, 20.9% had undergone a previous cesarean section. The majority (85.1%) underwent another cesarean section, with 75.5% occurring before the onset of labor. The rate of Vaginal Birth After Cesarean (VBAC) was 14.9%, with a success rate of 60.8%. Women who underwent three or more cesarean sections displayed greater social vulnerability. The chances of VBAC were higher among those who opted for a vaginal birth towards the end of gestation, had a prior vaginal birth, underwent labor induction, were admitted with over 4 centimeters of dilation, and without partner. Receiving care from the private health care system, having two or more prior cesarean sections, obstetric complications, and deciding on cesarean delivery late in gestation reduced the chances of VBAC. Age group, educational background, prenatal care adequacy, and the reason for the previous cesarean section did not result in significant differences.

CONCLUSION

The majority of women who underwent a previous cesarean section in Brazil are directed towards another surgery, and a higher number of cesarean sections is linked to greater social inequality. Factors associated with VBAC included choosing vaginal birth towards the end of gestation, having had a previous vaginal birth, higher cervical dilation upon admission, induction, assistance from the public health care system, absence of obstetric complications, and without a partner. Efforts to promote VBAC are necessary to reduce overall cesarean rates and their repercussions on maternal and child health.

Induction of labor via Foley balloon catheter placement for 6 vs 12 hours in women with 1 previous cesarean delivery and unfavorable cervices: a randomized controlled trial

BACKGROUND

Induction of labor in women with 1 previous cesarean delivery and unripe cervices is a high-risk process, carrying an increased risk of uterine rupture and the need for cesarean delivery. Balloon ripening is often chosen as prostaglandin use is associated with an appreciable risk of uterine rupture in vaginal birth after cesarean delivery. A shorter duration of placement of the balloon typically expedites delivery; however, this has not been evaluated in induction of labor after 1 previous cesarean delivery.

OBJECTIVE

This study aimed to compare Foley balloon catheter placement for 6 vs 12 hours in induction of labor after 1 previous cesarean delivery.

STUDY DESIGN

A randomized controlled trial was conducted in a university hospital in Malaysia from January 2022 to February 2023. Eligible women with 1 previous cesarean delivery admitted for induction of labor were enrolled. Participants were randomized after balloon catheter insertion for 6 or 12 hours of passive ripening before balloon deflation and removal to check cervical status for amniotomy. The primary outcome was the induction of labor to delivery interval. The secondary outcomes were largely derived from the core outcome set for trials on induction of labor (Core Outcomes in Women's and Newborn Health [CROWN]). The Student t test, Mann-Whitney U test, chi-square test, and Fisher exact test were used as appropriate for the data.

RESULTS

Overall, 126 women were randomized, 63 to each intervention. The mean induction of labor to delivery intervals were 23.0 (standard deviation, ±8.9) in the 6-hour arm and 26.6 (standard deviation, ±7.1) in the 12-hour arm (mean difference, -3.5 hours; 95% confidence interval, -6.4 to -0.7; P=.02). The median induction of labor (Foley balloon catheter insertion) to Foley balloon catheter removal intervals were 6.0 hours (interquartile range, 6.0-6.3) in the 6-hour arm and 12.0 hours (interquartile range, 12.0-12.5) in the 12-hour arm (P<.001). The median induction of labor to amniotomy intervals were 14.1 hours (interquartile range, 9.3-21.8) in the 6-hour arm and 19.0 hours (interquartile range, 15.9-22.0) in the 12-hour arm (P=.02). The usage rates of epidural analgesia in labor were 46.0% (29/63) in the 6-hour arm and 65.1% (41/63) in the 12-hour arm (relative risk, 0.71; 95% confidence interval, 0.51-0.98; P=.03). Spontaneous balloon catheter expulsion rates were 22.2% (14/63) in the 6-hour arm and 17.5% (11/63) in the 12-hour arm (relative risk, 1.27; 95% confidence interval, 0.63-2.58; P=.50), and additional ripening use rates (Foley reinsertion) were 46.0% (29/63) in the 6-hour arm and 31.7% (20/63) in the 12-hour arm (relative risk, 1.45; 95% confidence interval, 0.92-2.27; P=.10). The results were not different. Moreover, maternal satisfaction scores (0-10 numerical rating scale) of 9 (range, 8-10) in the 6-hour arm and 9 (range, 8-10) in the 12-hour arm (P=.41) were not different. Other secondary maternal and neonatal outcomes were not significantly different either.

CONCLUSION

Foley balloon catheter placement for 6 hours hastened birth and reduced epidural analgesia use in labor without a change in maternal satisfaction.

The impact of extending the second stage of labor on repeat cesarean section and maternal and neonatal outcome

OBJECTIVE

To evaluate the effects of extending the second stage of labor in women attempting a trial of labor after a cesarean section (TOLAC).

METHOD

A retrospective cohort study comparing maternal and neonatal outcomes following TOLAC over two periods: period I whose prolonged second stage was considered 2 h, and period II whose prolonged second stage was considered 3 h. The primary outcome was repeat cesarean delivery (CD) rate.

RESULTS

Incidence of repeat CD was significantly lower in period II (18.1% vs 29.7%, P < 0.001). Incidence of uterine rupture was significantly higher in period II (P < 0.001). Instrumental delivery rates were significantly higher in period II (26.2% vs 15.6%, odds ratio [OR] 1.67, 95% CI 1.21-3.56, P < 0.001). Rates of third- and fourth-degree perineal lacerations, chorioamnionitis, and length of hospital stay were similar between groups. Incidence of fetal acidemia was significantly higher in period II (1.5% vs 0.7%, OR 2.14, 95% CI 1.32-5.63, P < 0.001), and incidence of neonatal intensive care unit (NICU) admission was significantly higher (2.5% vs 1.6%, P = 0.004).

CONCLUSION

Extension of the second stage of labor is associated with a decrease in repeat CD rate with a concomitant increase in instrumental delivery rates, uterine rupture, fetal acidemia, and NICU admissions. These findings may warrant further consideration of allowing a prolonged second stage in patients attempting TOLAC.

An exploration of barriers to access to trial of labor and vaginal birth after cesarean in the United States: a scoping review

INTRODUCTION

Increasing the number of vaginal birth after cesarean (VBAC) deliveries is one strategy to reduce the cesarean rate in the United States. Despite evidence of its safety, access to trial of labor after cesarean (TOLAC) and VBAC are limited by many clinical and non-clinical factors. We used a scoping review methodology to identify barriers to access of TOLAC and VBAC in the United States and extract potential leverage points from the literature.

CONTENT

We searched PubMed, Embase, Cochrane, and CINAHL for peer-reviewed, English-language studies published after 1990, focusing on access to TOLAC and/or VBAC in the United States. Themes and potential leverage points were mapped onto the Minority Health and Health Disparities Research Framework. The search yielded 21 peer-reviewed papers.

SUMMARY

Barriers varied across levels of influence and included factors related to restrictive clinical guidelines, provider reluctance, geographic disparities, and midwifery scopes of practice. While barriers varied in levels of influence, the majority were related to systemic and interpersonal factors.

OUTLOOK

Barriers to TOLAC and VBAC exist at many levels and are both clinical and non-clinical in nature. The existing body of literature can benefit from more research examining the impact of recent revisions to clinical guidelines related to VBAC as well as additional qualitative studies to more deeply understand the complexity of provider reluctance.

Recent trends in term trial of labor after cesarean by number of prior cesarean deliveries

BACKGROUND

Cesarean delivery is a major source of maternal morbidity, and repeat cesarean delivery accounts for 40% of cesarean delivery, but recent data on the trial of labor after cesarean and vaginal birth after cesarean are limited.

OBJECTIVE

This study aimed to report the national rates of trial of labor after cesarean and vaginal birth after cesarean by number of previous cesarean deliveries and examine the effect of demographic and clinical characteristics on these rates.

STUDY DESIGN

This was a population-based cohort study using the US natality data files. The study sample was restricted to 4,135,247 nonanomalous singleton, cephalic deliveries between 37 and 42 weeks of gestation, with a history of previous cesarean delivery and delivered in a hospital between 2010 and 2019. Deliveries were grouped by number of previous cesarean deliveries (1, 2, or ≥3). The trial of labor after cesarean (deliveries with labor among deliveries with previous cesarean delivery) and vaginal birth after cesarean (vaginal deliveries among trial of labor after cesarean) rates were computed for each year. The rates were further subgrouped by history of previous vaginal delivery. Year of delivery, number of previous cesarean deliveries, history of previous cesarean delivery, age, race and ethnicity, maternal education, obesity, diabetes mellitus, hypertension, inadequate prenatal care, Medicaid payer, and gestational age were examined concerning the trial of labor after cesarean and vaginal birth after cesarean using multiple logistic regression. SAS software (version 9.4) was used for all analyses.

RESULTS

The trial of labor after cesarean rates increased from 14.4% in 2010 to 19.6% in 2019 (P<.001). This trend was seen in all categories of number of previous cesarean deliveries. Moreover, vaginal birth after cesarean rates increased from 68.5% in 2010 to 74.3% in 2019. The trial of labor after cesarean and vaginal birth after cesarean rates were the highest for deliveries with a history of both 1 previous cesarean delivery and a vaginal delivery (28.9% and 79.7%, respectively) and the lowest for those with a history of ≥3 previous cesarean deliveries and no history of vaginal delivery (4.5% and 46.9%, respectively). Factors associated with the trial of labor after cesarean and vaginal birth after cesarean rates are similar, but several factors have different directions of effect, such as non-White race and ethnicity, which is associated with a higher likelihood of trial of labor after cesarean but a lower likelihood of successful vaginal birth after cesarean.

CONCLUSION

More than 80% of patients with a history of previous cesarean delivery deliver by repeat scheduled cesarean delivery. With vaginal birth after cesarean rates increasing among those who attempt a trial of labor after cesarean, emphasis should be put on safely increasing the trial of labor after cesarean rates.

The Experience of Women Giving Birth after Cesarean Section-A Longitudinal Observational Study

Natural childbirth after a previous cesarean section is a debated issue despite scientific research and international recommendations. This study aimed to examine the experiences of women giving birth after a previous cesarean section, their preferences, and changes in attitudes towards childbirth after labor. This longitudinal study involved 288 pregnant women who had a previous cesarean section and completed a web-based questionnaire before and after labor, including information about their obstetric history, birth beliefs, and preferred mode of delivery. Among women who preferred a vaginal birth, nearly 80% tried it and 49.78% finished delivery by this mode. Among women declaring a preference for an elective cesarean section, 30% attempted a vaginal birth. Choosing a hospital where staff supported their decision (regardless of the decision) was the most helpful factor in preparing for labor after a cesarean section (63.19%). Women's birth preferences changed after labor, with women who had a vaginal birth after a cesarean section preferring this mode of delivery in their next pregnancy (89.34%). The mode of birth did not always follow the women's preferences, with some women who preferred a natural childbirth undergoing an elective cesarean section for medical reasons. A variety of changes were noticeable among women giving birth after a cesarean section, with a large proportion preferring natural birth in their next pregnancy. Hospitals should support women's birth preferences after a cesarean section (if medically appropriate), providing comprehensive counseling, resources, and emotional support to ensure informed decisions and positive birth experiences.

Racial bias in cesarean decision-making

BACKGROUND

Category II fetal heart tracing noted during continuous external fetal monitoring is a frequent indication for cesarean delivery in the United States despite its somewhat subjective interpretation. Black patients have higher rates of cesarean delivery and higher rates for this indication. Racial bias in clinical decision-making has been demonstrated throughout medicine, including in obstetrics.

OBJECTIVE

We sought to examine if racial bias affects providers' decisions about cesarean delivery for an indication of category II fetal heart tracings.

STUDY DESIGN

We constructed an online survey study consisting of 2 clinical scenarios of patients in labor with category II tracings. Patient race was randomized to Black and White; the vignettes were otherwise identical. Participants had the option to continue with labor or to proceed with a cesarean delivery at 3 decision points in each scenario. Participants reported their own demographics anonymously. This survey was distributed to obstetrical providers via email, listserv, and social media. Data were analyzed using chi-square tests at each decision point in the overall sample and in subgroup analyses by various participant demographics.

RESULTS

A total of 726 participants contributed to the study. We did not find significant racial bias in cesarean delivery decision-making overall. However, in a scenario of a patient with a previous cesarean delivery, Fisher's exact tests showed that providers <40 years old (n=322; P=.01) and those with <10 years of experience (n=239; P=.050) opted for a cesarean delivery for Black patients more frequently than for White patients at the first decision point. As labor progressed in this scenario, the rates of cesarean delivery equalized across patient race.

CONCLUSION

Younger providers and those with fewer years of clinical experience demonstrated racial bias in cesarean delivery decision-making at the first decision point early in labor. Providers did not show racial bias as labor progressed, nor in the scenario with a patient without a previous cesarean delivery. This bias may be the consequence of provider training with the Maternal-Fetal Medicine Unit Network Vaginal Birth After Cesarean Calculator, developed in 2007, and widely used to estimate the probability of successful vaginal birth after a cesarean delivery. This calculator used race as a predictive factor until it was removed in June 2021. Future studies should investigate if this bias persists following this change, while also focusing on interventions to address these findings.

Assessing the predictive accuracy of the new vaginal birth after cesarean calculator

BACKGROUND

The vaginal birth after cesarean (VBAC) calculator by the Maternal-Fetal Medicine Units (MFMU) Network was created to help providers counsel patients on predicted success of trial of labor after cesarean (TOLAC) using individualized risk assessment. The inclusion of race and ethnicity as predictors of VBAC in the 2007 calculator was problematic and potentially exacerbated racial disparities in obstetrics. Thus, a modified calculator without race and ethnicity was published in June 2021.

OBJECTIVE

This study aims to assess the accuracy of the 2007 and 2021 MFMU VBAC calculators in predicting VBAC success among racial/ethnic minority patients receiving obstetric care at a single urban tertiary medical center.

STUDY DESIGN

All patients with one prior low transverse cesarean delivery (CD) who underwent a trial of labor at term with a vertex singleton gestation from an urban tertiary medical center from May 2015 to December 2018 were reviewed. Demographic and clinical data were collected retrospectively. Associations between maternal characteristics and VBAC success were assessed using univariate and multivariable logistic regression. Predicted VBAC success rates using MFMU calculator were compared to actual outcomes (i.e. successful TOLAC/VBAC vs repeat cesarean delivery) across each racial and ethnic group.

RESULTS

A total of 910 deliveries met eligibility criteria and attempted TOLAC. A total of 662 (73%) achieved VBAC. The rate of VBAC was highest among Asian women (81%) and lowest among Black women (61%). Univariate analyses demonstrated that VBAC success was associated with maternal body mass index (BMI) < 30 kg/m², history of prior vaginal delivery, and absence of indication of arrest of dilation or descent for prior CD. Multivariate analyses evaluating predictors of VBAC reported in the 2021 VBAC Calculator showed that maternal age, history of arrest disorder for prior CD, and treated chronic hypertension were not significant in our patient population. The majority of patients who were White, Asian, or Other race with a VBAC had a 2007 Calculator predicted probability of VBAC >65%, while the majority of Black and Hispanic patients with a VBAC were more likely to have a predicted probability of VBAC between 35-65% (p<0.001). The majority of White, Asian, or Other race patients with a repeat CD had a 2007 Calculator predicted probability of VBAC >65%, while the majority of Black and Hispanic patients with a repeat CD had a predicted probability of VBAC between 35-65%. Across all racial and ethnic groups, the majority of patients with a VBAC had a 2021 Calculator predicted probability of VBAC >65%.

CONCLUSIONS

The inclusion of race/ethnicity in the 2007 MFMU VBAC calculator underestimates predicted VBAC success rates among Black and Hispanic patients receiving obstetric care at an urban tertiary medical center, thus we support the use of the 2021 VBAC calculator without race/ethnicity. Removing inclusion of race and ethnicity from VBAC counseling may be one way in which providers can ultimately contribute towards the reduction of racial and ethnic disparity in maternal morbidity in the United States. Further research is needed to understand the implication of treated chronic hypertension in VBAC success.

VBAC calculator 2.0: Recent evidence

Following criticism for the use of race as a biological predictor of vaginal birth after cesarean (VBAC), an updated version of the Society for Maternal-Fetal Medicine (SMFM) VBAC calculator has been published. The variable "African American" or "Hispanic" (yes/no), which produced systematically lower chances of VBAC for nonwhites has been replaced with "chronic hypertension requiring treatment" (yes/no). Although there are no published external validation studies to date, developers report accuracy (area under the curve and calibration) nearly identical to the original calculator and it is published online for immediate use. This review examines the history of the calculator, measures of its validity, and recent studies measuring its performance among Hispanics, Blacks, Asians, and others with lower range scores. Underprediction of successful VBAC is evident in the original calculator, especially as predicted VBAC decreases. These studies raise a concern about the use of calculator scores in clinical management, that is, discouraging or restricting access to labor after cesarean (LAC) for parents with lower calculator scores. This raises special concern for minority populations who experience increased cesarean-related morbidity, face obstacles accessing LAC care, and who may benefit disproportionately from increased LAC uptake. Although calculator developers have discouraged using calculator scores to restrict access to LAC, such uses are documented. It is not clear what effect the removal of race will have on calculator performance, and further study is required before calculator scores are used in counseling. This includes studies that include large numbers of low scoring and minority patients.

Methods of induction of labor after cesarean with no prior vaginal delivery-Perinatal outcomes

OBJECTIVE

To study the association between the method of induction of labor (IOL) and perinatal outcomes, among women undergoing labor after cesarean (LAC) with no prior vaginal delivery.

METHOD

A retrospective study including all women with no prior vaginal delivery undergoing IOL for LAC between March 2011 and January 2021. Oxytocin administration following prelabor rupture of membranes (PROM), oxytocin administration only, extra-amniotic balloon, and amniotomy were compared.

RESULTS

Overall, 363 women met the inclusion criteria: extra-amniotic balloon (157, 43.3%), oxytocin following PROM (95, 26.2%), amniotomy (72, 19.8%), and oxytocin (39, 10.7%). LAC success rate did not differ among study groups (P = 0.114), varying between 62.1% and 79.5%. There were three uterine ruptures (0.8%) in the entire cohort. The rate of uterine rupture, postpartum hemorrhage, and the composite of both were similar in all study groups. Neonatal outcomes did not differ between study groups, with composite adverse neonatal outcomes varying between 7.4% in the oxytocin following PROM to 1.9% in the extra-amniotic balloon group (P = 0.141). The following factors were independently associated with LAC success: taller maternal height, lower body mass index, earlier gestational age, and epidural analgesia.

CONCLUSIONS

All examined IOL methods with an unfavorable cervix carried similar outcomes. The clinical practice should be individualized.

Association Between Utilization of Digital Prenatal Services and Vaginal Birth After Cesarean

INTRODUCTION

Digital health services are a promising but understudied method for reducing common barriers to vaginal birth after cesarean (VBAC), including connection to facilities offering labor after cesarean and patient-centered counseling about mode of birth. This study assesses the relationship between use of digital prenatal services and VBAC.

METHODS

In this retrospective cohort study, we analyzed the use of digital prenatal services and mode of birth among users of an employer-sponsored digital women's and family digital health platform. All users had a prior cesarean birth. Users' self-reported data included demographics, medical history, and birth preferences. We used basic descriptive statistics and logistic regression models to assess the association between digital services utilization and VBAC, adjusting for key patient characteristics.

RESULTS

Of 271 included users, 44 (16.2%) had a VBAC and 227 (83.8%) had a cesarean birth. Users of both groups were similar in age, race, and ethnicity. Fewer users in the VBAC group (5/44, 11.4%) as compared with the cesarean birth group (62/227, 27.3%) had a prepregnancy body mass index greater than or equal to 30 (P = 0.02). Likewise, more users in the VBAC group preferred vaginal birth (34/44, 77.3% vs 55/227, 24.2%; P < 0.01). In adjusted models, the services associated with VBAC were care advocate appointments (adjusted odds ratio [aOR], 7.67; 95% CI, 1.99-54.4), health care provider appointments (aOR, 1.12; 95% CI, 1.02-1.25), and resource reads (aOR, 1.05, 95% CI, 1.00-1.09). VBAC rates were higher for users who reported the digital health platform influenced aspects of their pregnancy and birth.

DISCUSSION

Reducing cesarean birth rates is a national priority. Digital health services, particularly care coordination and education, are promising for accomplishing this goal through increasing rates of trial of labor after cesarean and subsequent VBAC rates.

Racial Disparities in Respectful Maternity Care During Pregnancy and Birth After Cesarean in Rural United States

OBJECTIVE

To describe the experiences of pregnancy and birth after cesarean of women who live in rural areas of the United States, including access to vaginal birth after cesarean (VBAC), type of maternity care provider, travel times, autonomy in decision making, and respectful maternity care.

DESIGN

Retrospective observational study.

SETTING

Online questionnaire of women who gave birth in the United States.

PARTICIPANTS

Women (N = 1,711) with histories of cesarean and subsequent births within 5 years of participating.

METHODS

We calculated descriptive and bivariate statistics by identified areas of residence and stratified measures of autonomy and respectful maternity care by self-identification as a member of a racialized group. We applied qualitative descriptive analysis to responses to an open-ended survey question.

RESULTS

A total of 299 (17.5%) participants identified their areas of residence as rural. Similar percentages of rural and metropolitan participants were able to plan VBAC (p = .88). More rural participants than metropolitan participants reported travel times of more than 60 minutes to give birth (p < .001), and fewer had obstetricians (p = .002) or doulas (p = .03). Rural participants from racialized groups experienced significantly less respectful maternity care than White, non-Hispanic rural participants and all metropolitan participants (p = .04). Qualitative data illustrating the main findings are included.

CONCLUSIONS

Our findings highlight challenges faced by rural residents accessing VBAC and help explain why rates of VBAC in rural areas remain low. We suggest a range of clinical and policy strategies to improve access to VBAC in rural areas and to improve the quality of maternity care for racialized women who live in rural areas.

Predictors of Repeat Cesarean Section in Women with One Previous Lower Segment Cesarean Section: A Retrospective Study from Malaysia

Background

The rates of repeat cesarean section (CS) among women with previous CS are increasing worldwide. The predictors of a repeat CS can vary across different populations.

Objective

To determine the predictors of repeat CS among women from Malaysia with one previous lower segment CS (LSCS) who underwent trial of labor (TOLAC).

Materials and Methods

This retrospective cohort study included women with one previous LSCS who followed up and delivered their current pregnancy at Hospital Universiti Sains Malaysia (USM), Kelantan, Malaysia, between January 01, 2016, and December 31, 2017. Women with singleton pregnancies were included while those who had a history of classical CS, current pregnancy with preterm birth, non-cephalic pregnancy, lethal fetal anomalies, uterine rupture, and severe preeclampsia or planned for elective CS were excluded. Logistic regressions were performed.

Results

The study included 388 women who underwent TOLAC and successfully gave childbirth through vaginal birth after cesarean (VBAC) (n = 194) or emergency LSCS (n = 194). Factors significantly associated with repeat CS were no history of vaginal delivery (adjusted odds ratio (aOR): 2.71; 95% confidence interval (CI): 1.60, 4.60; P < 0.001), estimated fetal weight ≥3500 grams (aOR: 4.78; 95% CI: 2.45-9.34; P < 0.001), and presence of meconium-stained liquor (aOR: 2.40; 95% CI: 1.33-4.35; P = 0.004).

Conclusion

The above-mentioned predictors of a repeat CS among women from Malaysia with one previous LSCS who underwent TOLAC can be useful for clinicians in making an informed decision.

Factors associated with labor after cesarean in a prospective cohort

BACKGROUND

The goals of this study were (a) to determine how experiences in the first perinatal period shape birth mode preference among individuals with a first birth by cesarean; and (b) to examine the relationship between birth mode preference and other factors and subsequent labor after cesarean (LAC).

METHODS

Data are from the First Baby Study, a prospective cohort of 3006 primiparous individuals. The analytic sample includes individuals with a first cesarean birth and a second birth during the 5-year follow-up period (n = 394). We used multivariable logistic regression to examine the relationship between experiences in the first perinatal period and subsequent preference for vaginal birth, and between preference for vaginal birth and LAC in the second birth.

RESULTS

About a third of the sample preferred vaginal birth in a future birth, and 20% had LAC. Factors associated with higher odds of future vaginal birth preference were favorable prenatal attitude toward vaginal birth, lower perceived maternal-infant bonding at 1 month after the first birth, post-traumatic stress symptoms after the first birth, and desiring more than 1 additional child after the first birth. Odds of LAC were nearly 8 times higher among those who preferred vaginal birth (AOR = 7.69, P < .001). Fatigue after the first birth, post-traumatic stress symptoms after the first birth, and having higher predicted chances of vaginal birth after cesarean were also associated with higher odds of LAC.

CONCLUSIONS

Our findings suggest that the formation of preferences around vaginal birth may present a modifiable target for future counseling and shared decision-making interventions.

Barriers to labor after cesarean: A survey of United States midwives

INTRODUCTION

Despite calls for increased vaginal birth after cesarean (VBAC), &lt;14% of candidates have VBAC. Requirements for documentation of scar type, and prohibitions on induction or augmentation of labor are not supported by evidence but may be widespread. The purpose of this study was to document midwives' perceptions of barriers to labor after cesarean (LAC) and their effects on midwives' ability to accommodate patient desires for LAC.

METHODS

Midwives certified by the American Midwifery Certification Board (AMCB) were surveyed in 2019. Multiple option and open-ended text responses were analyzed using quantitative statistics and thematic content analysis. Select barriers to LAC, ability to accommodate LAC, and supportiveness of collaborators among midwives offering LAC were explored.

RESULTS

Responses from 1398 midwives were analyzed. Eighty-four percent felt able to accommodate LAC "most of the time," and 39% reported one or more barriers to LAC. Barriers decreased ability to accommodate LAC by as much as 80%. Analysis of text responses revealed specific themes.

CONCLUSIONS

Thirty-nine percent of midwives reported their practice was limited by one or more barriers that were inconsistent with professional guidelines. Imposition of barriers was driven primarily by collaborating physicians, and superceded supportive practices of midwives, nurses, and system administrators. Affected midwives were significantly less able to accommodate patient requests for LAC than those not affected. Midwives also reported pride in providing VBAC care, restrictions specific to midwifery scope of practice, and variation in physician support for LAC within practices affecting their ability to provide care.

Influence of previous delivery mode on perineal trauma risk

OBJECTIVE

To evaluate the impact of a previous pregnancy and delivery on perineal trauma rates in the subsequent vaginal birth.

METHODS

Retrospective cohort study. The perineal outcomes of secundiparous women with history of previous (first) delivery in one of three categories: failed operative vaginal delivery (FOVD) and second-stage emergency cesarean section (EmCS); elective cesarean section (ElCS), and vaginal delivery (VD) with intact perineum, were compared with a control primiparous group.

RESULTS

The percentage obstetric anal sphincter injuries (OASIS)at first vaginal delivery was 17.3% (n = 9) after previous FOVD+EmCS, 12.9% (n = 18) after previous ElCS, and 0.6% (n = 9) after previous VD maintaining an intact perineum, compared with 6% (n = 1193) in the control primiparous group of women. Multivariate regression analysis demonstrated that previous FOVD+EmCS and ElCS were associated with a statistically significant increased risk of OASIS of 180% and 110% when compared with control (odds ratio [OR] 2.80; 95% confidence interval [CI] 1.35-5.78 and OR 2.10; 95% CI 1.27-3.48, respectively). Previous VD with intact perineum was associated with a statistically significantly reduced risk of OASIS (OR 0.09; 95% CI 0.04-0.17).

CONCLUSIONS

Previous FOVD+EmCS and ElCS were associated with increased risk of OASIS in subsequent vaginal delivery compared with control, whereas previous VD with intact perineum was associated with decreased risk.