Nationwide implementation of a decision aid on vaginal birth after cesarean: a before and after cohort study.

OBJECTIVES: Woman with a history of a previous cesarean section (CS) can choose between an elective repeat CS (ERCS) and a trial of labor (TOL), which can end in a vaginal birth after cesarean (VBAC) or an unplanned CS. Guidelines describe women's rights to make an informed decision between an ERCS or a TOL. However, the rates of TOL and vaginal birth after CS varies greatly between and within countries. The objective of this study is to asses nation-wide implementation of counselling with a decision aid (DA) including a prediction model, on intended delivery compared to care as usual. We hypothesize that this may result in a reduction in practice variation without an increase in cesarean rates or complications. METHODS: In a multicenter controlled before and after cohort study we evaluate the effect of nation-wide implementation of a DA. Practice variation was defined as the standard deviation (SD) of TOL percentages. RESULTS: A total of 27 hospitals and 1,364 women were included. A significant decrease was found in practice variation (SD TOL rates: 0.17 control group vs. 0.10 intervention group following decision aid implementation, p=0.011). There was no significant difference in the ERCS rate or overall CS rates. A 21% reduction in the combined maternal and perinatal adverse outcomes was seen. CONCLUSIONS: Nationwide implementation of the DA showed a significant reduction in practice variation without an increase in the rate of cesarean section or complications, suggesting an improvement in equality of care.

Prevalence of Home Births and Associated Risk Profile and Maternal Characteristics, 2016-2018.

OBJECTIVE: To estimate the prevalence of pregnancies that meet the low-risk criteria for planned home births and describe geographic and maternal characteristics of home births compared with hospital births. METHODS: Data from the 2016-2018 Pregnancy Risk Assessment Monitoring System (PRAMS), a survey among women with recent live births, and linked birth certificate variables were used to calculate the prevalence of home births that were considered low-risk. We defined low-risk pregnancy as a term (between 37 and 42 weeks of gestation), singleton gestation with a birth weight within the 10th-90th percentile mean for gestational age (as a proxy for estimated fetal size appropriate for gestational age), without prepregnancy or gestational diabetes or hypertension, and no vaginal birth after cesarean (VBAC). We also calculated the prevalence of home and hospital births by site and maternal characteristics. Weighted prevalence estimates are presented with 95% CIs to identify differences. RESULTS: The prevalence of home births was 1.1% (unweighted n=1,034), ranging from 0.1% (Alabama) to 2.6% (Montana); 64.9% of the pregnancies were low-risk. Among the 35.1% high-risk home births, 39.5% of neonates were large for gestational age, 20.5% of neonates were small for gestational age, 17.1% of the women had diabetes, 16.9% of the women had hypertension, 10.6% of the deliveries were VBACs, and 10.1% of the deliveries were preterm. A significantly higher percentage of women with home births than hospital births were non-Hispanic White (83.9% vs 56.5%), aged 35 years or older (24.0% vs 18.1%), with less than a high school-level of education (24.6% vs 12.2%), and reported no health insurance (27.0% vs 1.9%). A significantly lower percentage of women with home births than hospital births initiated prenatal visits in the first trimester (66.9% vs 87.1%), attended a postpartum visit (80.1% vs 90.0%), and most often laid their infants on their backs for sleep (59.3% vs 79.5%). CONCLUSIONS: Understanding the risk profile, geographic distribution, and characteristics of women with home births can guide efforts around safe birthing practices.

Recent Trends in Vaginal Birth After Cesarean Delivery: United States, 2016-2018.

For the first time since 2004 (1), national data on vaginal birth after cesarean delivery (VBAC) became available in 2016 after all reporting areas implemented the 2003 revision of the U.S. Standard Certificate of Live Birth. Women who deliver vaginally after a previous cesarean are less likely to experience birth-related morbidity such as blood transfusion, ruptured uterus, unplanned hysterectomy, and admission to the Intensive Care Unit than women who have repeat cesareans (2). This report describes recent trends in the VBAC rates by maternal age, race and Hispanic origin, mother's state of residence, and gestational age of the newborn from 2016 to 2018.

Vaginal birth after caesarean birth in Italy: variations among areas of residence and hospitals.

BACKGROUND: The rates of caesarean section (CS) are increasing globally. CS rates are one of the most frequently used indicators of health care quality. Vaginal Birth After Caesarean (VBAC) could be considered a reasonable and safe option for most women with a previous CS. Despite this fact, in some European countries, many women who had a previous CS will have a routine CS subsequently and VBAC rates are extremely variable across countries. VBAC use is inversely related to caesarean use. The objective of the present study was to analyze VBAC rates with respect to caesarean rates and the variations among areas of residence, hospitals and hospital ownership types in Italy. METHODS: This study was based on information from the Hospital Information System (HIS). We collected data from all deliveries in Italy from January 1, 2010 to December 31, 2014 and we considered only deliveries with a previous caesarean section. Applying multivariate logistic regression analysis, the adjusted proportions of VBAC for each Local Health Units (LHU), each hospital and by hospital ownership types were calculated. Cross-classified logistic multilevel models were performed to analyze within geographic, hospitals and hospital ownership types variations. RESULTS: We studied a total of 77,850 deliveries with a previous caesarean section in Italy between January 1, 2010 and December 31, 2014. The proportion of VBAC in Italy slightly increased in the last few years, from 5.8% in 2010 to 7.5% in 2014. Proportions of VBAC ranged from 0.29 to 50.05% in Italian LHUs. The LHUs with lower proportions of VBAC deliveries were characterized by higher values for primary caesarean deliveries. Private hospitals showed the lowest mean of crude VBAC proportions but the highest variation among hospitals, ranging from 0 to 47.1%. CONCLUSIONS: Hospital rates of caesarean section for women with at least one previous caesarean section vary widely, and only some of the variation can be explained by case-mix and hospital-level factors, suggesting that additional factors influence practices. Identifying disparities in VBAC may have important implications for health services planning and targeted efforts to reduce overall rates of caesarean deliveries.

Prior caesarean section and likelihood of vaginal birth, 2012-2016, China.

OBJECTIVE: To examine the trends and safety of vaginal birth after caesarean section around the period of the one-child policy relaxation in China. METHODS: We used data from China's National Maternal Near Miss Surveillance System between 2012 and 2016. To examine trends in vaginal birth after caesarean section, we used Poisson regression with a robust variance estimator. We also assessed the association between vaginal birth after caesarean section and maternal and perinatal outcomes. FINDINGS: We analysed 871 636 deliveries by women with a previous caesarean section. Both in 2012 and 2016, the rate of vaginal birth after caesarean section was 9.8%. After adjusting for institutional, sociodemographic and obstetric characteristics, the rate increased by 14% between 2012 and 2016 (adjusted relative risk, aRR: 1.14; 95% confidence interval, CI: 1.07-1.21). Compared to women with a repeat caesarean section, women with a vaginal birth after caesarean section experienced lower incidence of uterine rupture (aRR: 0.26, 95% CI: 0.16-0.42), blood transfusion (aRR: 0.68, 95% CI: 0.53-0.87) and admission to the intensive care unit (aRR: 0.36, 95% CI: 0.25-0.52), but higher incidence of intrapartum stillbirths, (aRR: 7.20, 95% CI: 6.09-8.51), newborns with a 5-minute Apgar score less than 7 (aRR: 1.75, 95% CI: 1.54-1.99) and neonatal death before discharge (aRR: 1.90, 95% CI: 1.61-2.24). CONCLUSION: Promotion of vaginal birth after caesarean section could increase the rate even further in China. To ensure the safety of mothers and their newborns, national policies and guidelines on vaginal birth after caesarean section are needed.

Vaginal birth after caesarean section: Current status and where to from here?

Vaginal birth after caesarean (VBAC) delivery remains a controversial topic, and one for which there is a lack of robust data to guide clinicians and parturients regarding their best option for mode of delivery in a subsequent pregnancy. In many developed countries the trend observed in recent years is that of progressively reduced VBAC rates, and hence increased use of elective repeat caesarean section (ERCS). This factor has contributed, more than any other, to the disproportionately high caesarean section (CS) rates in many countries. With current CS rates varying between 30 and 50% in the developed world, a previous CS is the cited primary indication in approximately 30%. To compound matters, there are huge variations in the reported VBAC rates between different countries, regions and even institutions. This review has focused on the recent trends in VBAC attempt, success and overall rates internationally, with inclusion of figures for a period of 25 years from a single Irish institution. An analysis of the reported factors that influence VBAC success, or failure, is presented. The complex task of estimating risk, both perinatal and maternal, for women who pursue VBAC or ERCS, is included in this review. Finally, the current evidence base for clinical practice pertaining to VBAC is outlined, with inclusion of commentary regarding the future for this difficult area of obstetric practice.

Prediction of vaginal birth after cesarean delivery in Chinese parturients.

There is an urgent need in China to better predict vaginal birth after cesarean (VBAC) to face the challenge of the second child policy. We aimed to validate a widely used VBAC prediction model (Grobman's model) and a modified version of this model in a Chinese population. In this retrospective cohort study, 444 women with one cesarean delivery and at least one subsequent attempt for a trial of labor in Nanjing, China were included. The considered potential VBAC predictors included Grobman's background variables and five new variables. Overall, a total of 370 women had VBAC, with a success rate of 83.3%. The new background variables "maternal height" and "estimated fetal weight" were considered as two additional predictors for VBAC. The AUC of Grobman's model was 0.831 (95%CI = 0.775-0.886) while the AUC of our modified model with two new variables added was 0.857 (sensitivity = 72.2%, specificity = 83.8%). However, the difference between the AUC of the two models was not significant (Z = -1.69, P = 0.091). We confirmed that Grobman's model was accepted in the Chinese population. A modified model that is supplemented with maternal height and estimated fetal weight needs to be further studied in the Chinese population.

Out-of-hospital births in California 1991-2011.

OBJECTIVE: We investigated the frequencies and characteristics of out-of-hospital births in a 20-year period in California, where 1 of every 7 births in the United States occurs. STUDY DESIGN: Birth certificate records of deliveries in California between 1991 and 2011 were analyzed. Out-of-hospital births were assessed by year, parity, gestational age and maternal race/ethnicity. RESULTS: In the 20-year period there were 10 593,904 deliveries, of which 46 243 occurred out of hospital (0.44%). Out-of-hospital births decreased from 0.54 to 0.38% per year between 1991 and 2004, and increased from 0.41% in 2005 to 0.61% in 2011. In contrast, preterm out-of-hospital births declined from 7.2% in 2006 to 5.0% in 2011. The frequency of vaginal birth after cesarean in the out-of-hospital birth cohort increased from 1.2% (n=19) in 1996 to 4.2% (n=82) in 2011. CONCLUSION: California birth records from a 20-year period show an increase in out-of-hospital births from years 2005 to 2011, following a period of decline from 1991 to 2004.

Vaginal Birth After Cesarean Trends: Which Way Is the Pendulum Swinging?

The cesarean delivery rate has plateaued at 32%; concurrently, after peaking in the mid-1990s, trial of labor after cesarean (TOLAC) rates have declined. Less than 25% of women with a prior cesarean delivery attempt a future TOLAC. This decreasing trend in TOLAC is caused by inadequate resource availability, malpractice concerns, and lack of knowledge in patients and providers regarding the perceived risks and benefits. This article outlines the factors influencing recent vaginal birth after cesarean trends in addition to reviewing the maternal and neonatal outcomes associated with TOLAC, specifically in high-risk populations.

The Future of Cesarean Delivery Rates in the United States.

The US cesarean delivery rate remains 30%-32%. Increases in maternal age, obesity, and diabetes put upward pressure on this rate. Alternatives to cesarean delivery, vaginal birth after cesarean (VBAC), and operative vaginal delivery, are underutilized and there are substantial challenges to their resurgence. Practice guidelines offer promise, but demonstrate only minor reductions in cesarean delivery. We estimate that the overall rate in the US will remain 27%-30% for the immediate future. As more states move to recognize the independent practice of midwifery and more payers seek lower cost options for childbirth, we anticipate the overall rate will drop to 20% or 25%, but not for another 15 years or more.