No. 382-Trial of Labour After Caesarean

Effectiveness of shared decision-making for mode of delivery after caesarean section: A systematic review and meta-analysis of randomized controlled trials

AIM

To review the content, format and effectiveness of shared decision-making interventions for mode of delivery after caesarean section for pregnant women.

DESIGN

Systematic review and meta-analysis.

METHODS

Six databases (PubMed, Web of science Core Collection, Cochrance Network, Embase, CINAHL, PsycINFO) were searched starting at the time of establishment of the database to May 2023. Following the PRISMAs and use Review Manager 5.3 software for meta-analysis. Two review authors independently assessed the quality of the studies using the risk of bias 2 tool. The protocol was registered in PROSPERO (CRD42023410536).

RESULTS

The search strategy obtained 1675 references. After abstract and full text screening, a total of seven studies were included. Shared decision-making interventions include decision aids and counselling that can help pregnant women analyse the pros and cons of various options and help them make decisions that are consistent with their values. The pooled results showed that shared decision-making intervention alleviated decisional conflicts regarding mode of delivery after caesarean section, but had no effect on knowledge and informed choice.

CONCLUSION

The results of our review suggest that shared decision-making is an effective intervention to improve the quality of decision-making about the mode of delivery of pregnant women after caesarean section. However, due to the low quality of the evidence, it is recommended that more studies be conducted in the future to improve the quality of the evidence.

CORRELATION WITH CLINICAL PRACTICE

This systematic review and meta-analysis provides evidence for the effectiveness of shared decision-making for mode of delivery after cesarean section and may provide a basis for the development of intervention to promote the participation of pregnant women in the decision-making process.

Burden and outcomes of postpartum haemorrhage in Nigerian referral-level hospitals

OBJECTIVE

To determine the prevalence of primary postpartum haemorrhage (PPH), risk factors, and maternal and neonatal outcomes in a multicentre study across Nigeria.

DESIGN

A secondary data analysis using a cross-sectional design.

SETTING

Referral-level hospitals (48 public and six private facilities).

POPULATION

Women admitted for birth between 1 September 2019 and 31 August 2020.

METHODS

Data collected over a 1-year period from the Maternal and Perinatal Database for Quality, Equity and Dignity programme in Nigeria were analysed, stratified by mode of delivery (vaginal or caesarean), using a mixed-effects logistic regression model.

MAIN OUTCOME MEASURES

Prevalence of PPH and maternal and neonatal outcomes.

RESULTS

Of 68 754 women, 2169 (3.2%, 95% CI 3.07%-3.30%) had PPH, with a prevalence of 2.7% (95% CI 2.55%-2.85%) and 4.0% (95% CI 3.75%-4.25%) for vaginal and caesarean deliveries, respectively. Factors associated with PPH following vaginal delivery were: no formal education (aOR 2.2, 95% CI 1.8-2.6, P < 0.001); multiple pregnancy (aOR 2.7, 95% CI 2.1-3.5, P < 0.001); and antepartum haemorrhage (aOR 11.7, 95% CI 9.4-14.7, P < 0.001). Factors associated with PPH in a caesarean delivery were: maternal age of >35 years (aOR 1.7, 95% CI 1.5-2.0, P < 0.001); referral from informal setting (aOR 2.4, 95% CI 1.4-4.0, P = 0.002); and antepartum haemorrhage (aOR 3.7, 95% CI 2.8-4.7, P < 0.001). Maternal mortality occurred in 4.8% (104/2169) of deliveries overall, and in 8.5% (101/1182) of intensive care unit admissions. One-quarter of all infants were stillborn (570/2307), representing 23.9% (429/1796) of neonatal intensive care unit admissions.

CONCLUSIONS

A PPH prevalence of 3.2% can be reduced with improved access to skilled birth attendants.

Predictors of successful trial of labor after cesarean section (TOLAC) in women with one prior transverse cesarean section at Tertiary Hospitals in northwest Ethiopia: a multicenter study

BACKGROUND

Trials of labor after cesarean section is the preferred strategy to decrease the cesarean delivery rate and reducing complications associated with multiple cesarean sections. The success rate of trials of labor after cesarean section and associated factors have not been well documented in Ethiopia. Hence, this study was aimed to determine the success rate and factors associated with the trial of labor after one cesarean section in five Comprehensive Specialized Hospitals located in northwest Ethiopia.

METHODS

An institutional-based cross-sectional study was conducted among 437 women who came for the trial of labor from December 1, 2021, to March 30, 2022. All women who fulfilled the eligibility criteria were included to this study. Data was collected using structured and pre-tested questionnaire. Then, the data was entered into Epi Data 4.6 software and exported to SPSS version 26 for analysis. To identify the variables influencing the outcome variable, bivariable and multivariable logistic regression analyses were conducted. The model's fitness was checked using the Hosmer-Lemeshow goodness of fit test, and an adjusted odds ratio with a 95% confidence interval was used to declare the predictors that are significantly associated with TOLAC.

RESULTS

The success rate of the trial of labor after one cesarean section was 56.3% (95% CI, 51.3%, 61.2%). Maternal age ≥ 35 years (AOR: 3.3, 95% CI 1.2, 9.3), the fetal station at admission ≤ zero (AOR: 5. 6, 95% CI 3.3, 9.5), vaginal delivery before cesarean section (AOR: 1.9, 95% CI 1.2, 3.2), and successful vaginal birth after cesarean delivery (AOR 2.2, 95% CI 1.2, 4.1) were found to have a significant association with the success rate of trial of labor after cesarean section.

CONCLUSIONS

In this study, the success rate of the trial of labor after a cesarean section was low as compared to the ACOG guideline and other studies in different countries. Therefore, the clinicians ought to offer counsel during antenatal and intrapartum period, encourage the women to make informed decision on the mode of delivery, and the practitioners need to follow fetal and maternal conditions strictly to minimize adverse birth outcomes.

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.

Influence of organizational factors on the offer and success rate of a trial of labor after cesarean section in Belgium: an ecological study

BACKGROUND

Trial of Labor After Cesarean is an important strategy for reducing the overall rate of cesarean delivery. Offering the option of vaginal delivery to a woman with a history of cesarean section requires the ability to manage a potential uterine rupture quickly and effectively. This requires infrastructure and organization of the maternity unit so that the decision-to-delivery interval is as short as possible when uterine rupture is suspected. We hypothesize that the organizational characteristics of maternity units in Belgium have an impact on their proposal and success rates of trial of labour after cesarean section.

METHODS

We collected data on the organizational characteristics of Belgian maternity units using an online questionnaire. Data on the frequency of cesarean section, trial of labor and vaginal birth after cesarean section were obtained from regional perinatal registries. We analyzed the determinants of the proposal and success of trial of labor after cesarean section and report the associations as mean proportions.

RESULTS

Of the 101 maternity units contacted, 97 responded to the questionnaire and data from 95 was included in the analysis. Continuous on-site presence of a gynecologist and an anesthetist was associated with a higher proportion of trial of labor after cesarean section, compared to units where staff was on-call from home (51% versus 46%, p = 0.04). There is a non-significant trend towards more trial of labor after cesarean section in units with an operating room in or near the delivery unit and a shorter transfer time, in larger units (> 1500 deliveries/year) and in units with a neonatal intensive care unit. The proposal of trial of labor after cesarean section and its success was negatively correlated to the number of cesarean section in the maternity unit (Spearman' rho = 0.50 and 0.42, p value < 0.001).

CONCLUSIONS

Organizational differences in maternity units appear to affect the proposal of trial of labor after cesarean section. Addressing these organizational factors may not be sufficient to change practice, given that general tendency to perform a cesarean section in the maternity unit is the main contributor to the percentage of trial of labor after cesarean.

Perinatal Outcomes of Pregnancy in Women with Scarred Uteri

Objective

Uterine scarring is risky for the pregnancy and is closely associated with adverse pregnancy outcomes. Here, we investigated risk factors and associated perinatal outcomes in singleton pregnant women with uterine scars.

Methods

This retrospective cohort study was conducted on singleton pregnant women who delivered at the West China Second University Hospital between January 1, 2021, and December 31, 2021.

Results

The control group included 13,433 cases without uterine scars. The study group involved 2397 cases with one previous cesarean delivery (PCD), 163 cases with two PCDs, 12 cases with three PCDs, and 184 cases with non-cesarean uterine scars. The study group had a significantly higher incidence of placenta previa (6.4%), placenta percreta (5.3%), preterm delivery (10.3%), postpartum hemorrhage (3.4%), uterine rupture (9.4%), hysterectomy (0.18%), and bladder injury (0.4%) when compared with the control group (P <0.05). The scarred uterus cases with 1, 2, or 3 PCDs had significantly different complications, with the higher PCD frequency correlating with increased rates of placenta previa, placenta percreta, postpartum hemorrhage, uterine rupture, and uterine resection. Moreover, the hospitalization time, cesarean operation time, and intrapartum bleeding in the current pregnancy significantly increased with increasing PCD frequency (P <0.05). Analysis of the association between the duration of the interval between PCD and re-pregnancy and pregnancy complication revealed that the incidence of pernicious placenta previa was statistically higher in cases with intervals of <2 years or ≥5 years (4.7%) than in cases with 2 years ≤ interval time <5 years (2.5%) (P <0.05).

Conclusion

Pregnancies with uterine scars may experience higher rates of adverse perinatal outcomes. This calls for increased observation during pregnancy and delivery to reduce maternal and fetal complications.

Vaginal birth after cesarean section: A quantitative study exploring women's understanding and experience regarding VBAC rates in Greece

INTRODUCTION

Vaginal birth after cesarean section (VBAC) is a choice of birth that provides many advantages for women. This study presents women's VBAC experience in a Greek population. The study's aims were mainly to determine the reasons for choosing VBAC, women's feelings during pregnancy and their experience, and level of post-birth satisfaction.

METHODS

This study is sampling research which has a cross-section retrospect study design. The study was held via the internet due to a self-administered questionnaire which is comprises both open-ended and close-ended questions. Data analysis was performed in S.P.S.S. 20 and Microsoft Excel.

RESULTS

A total number of 473 women participated in this study. The findings showed that during pregnancy and childbirth over 50% of women felt very happy and satisfied, while 35% to 40% felt moderate or no fear at all. Furthermore, 96.48% of them would attempt for a VBAC birth again while 97.36% would recommend this way of delivery to other women. There was a total of 78.85% of succeeded VBAC. The main reason for women to choose VBAC for a birth option were the desire for a normal birth (23.1%), the thought of vaginal birth as the normal way of giving birth (22.4%), to avoid another surgery (14.2%) and to experience a vaginal birth (10%).

CONCLUSIONS

VBAC is an option that needs to be offered more in Greece, and needs improvement in obtaining informed consent in obstetric care services. More studies are required to draw further conclusions.

Predictors of successful vaginal birth after a cesarean section in Ethiopia: a systematic review and meta-analysis

BACKGROUND

The rates of successful vaginal birth after previous cesarean section (VBAC) have been increasing with minimal complication. Successful vaginal birth after cesarean section improves maternal and fetal outcomes by shortening the length of hospital stay, avoiding abdominal surgery, decreasing the risk of infections and hemorrhage, and decreasing injury of the bladder and bowel. Despite a few single studies stating different predictors of successful VBAC, there is a lack of nationwide data to show the determinants of successful VBAC. Thus, this meta-analysis aimed to determine the predictors of successful VBAC in Ethiopia.

METHODS

A systematic literature search was performed from PubMed, Web of Sciences, EMBASE, CINAHL, and Google scholar until July 25, 2022. The quality of included studies was evaluated using the Joanna Briggs Institute (JBI) critical appraisal checklist. The analysis was executed using Stata 14 statistical software. Heterogeneity was evaluated statistically using Cochran's Q-statistic and quantified by the I² value. A random-effects model was used to estimate the determinants of successful vaginal birth after a cesarean section if substantial heterogeneity was detected across included studies; otherwise, a fixed-effects model was used.

RESULTS

Women living in rural residence (AOR: 2.14; 95% CI: 1.01, 4.52), history of previous spontaneous vaginal delivery (AOR: 2.92; 95% CI: 2.02, 4.23), previous successful vaginal birth after previous cesarean section (AOR: 5.29; 95% CI: 2.20, 12.69), history of stillbirth (AOR: 1.57; 95% CI: 1.20, 2.04), cervical dilation of ≥ 4 cm at admission (AOR: 2.14; 95% CI: 1.27, 3.61), spontaneous ruptured membranes at admission (AOR: 1.32; 95% CI: 1.17, 1.48) were independent determinants of successful vaginal birth after previous cesarean section.

CONCLUSION

The results of this meta-analysis showed that successful VBAC was influenced by past and present obstetric conditions and other predictors. Thus, it is recommended that obstetric care providers should emphasize those factors that lead to successful vaginal birth during counseling and optimal selection of women for the trial of labour after cesarean section.

SYSTEMATIC REVIEW AND META-ANALYSIS REGISTRATION

PROSPERO CRD42022329567.

Directive clinique no 432c : Déclenchement artificiel du travail

OBJECTIFS

Présenter des données probantes et des recommandations sur la maturation cervicale et le déclenchement artificiel du travail. Fournir de l'information aux professionnels accoucheurs et aux personnes enceintes sur les soins périnataux optimaux et la prévention des interventions obstétricales inutiles.

POPULATION CIBLE

Toutes les patientes enceintes. BéNéFICES, RISQUES ET COûTS: La mise en application interprofessionnelle et cohérente de la présente directive, l'équipement adéquat et le personnel compétent améliorent la sécurité des soins per partum. Les personnes enceintes et leurs personnes de soutien doivent être informées des risques et bénéfices du déclenchement artificiel du travail. DONNéES PROBANTES: La littérature publiée jusqu'en mars 2022 a été passée en revue. Une recherche a été effectuée dans les bases de données PubMed, CINAHL et Cochrane Library pour répertorier des revues systématiques, des essais cliniques randomisés et des études observationnelles sur la maturation cervicale et le déclenchement artificiel du travail. La littérature grise (non publiée) a été obtenue à l'aide de recherches menées dans des sites Web d'organismes s'intéressant à l'évaluation des technologies dans le domaine de la santé et d'organismes connexes, dans des collections de directives cliniques, des registres d'essais cliniques et des sites Web de sociétés de spécialité médicale nationales et internationales. MéTHODES DE VALIDATION: Les auteurs ont évalué la qualité des données probantes et la force des recommandations en utilisant le cadre méthodologique GRADE (Grading of Recommendations, Assessment, Development, and Evaluation). Voir l'annexe A en ligne (tableau A1 pour les définitions et tableau A2 pour l'interprétation des recommandations fortes et conditionnelles [faibles]). PROFESSIONNELS CONCERNéS: Tous les fournisseurs de soins obstétricaux. DÉCLARATIONS SOMMAIRESMISOPROSTOL: OCYTOCINE: RECOMMANDATIONS.

Guideline No. 432c: Induction of Labour

OBJECTIVES

This guideline presents evidence and recommendations for cervical ripening and induction of labour. It aims to provide information to birth attendants and pregnant individuals on optimal perinatal care while avoiding unnecessary obstetrical intervention.

TARGET POPULATION

All pregnant patients.

BENEFITS, RISKS, AND COSTS

Consistent interprofessional use of the guideline, appropriate equipment, and trained professional staff enhance safe intrapartum care. Pregnant individuals and their support person(s) should be informed of the benefits and risks of induction of labour.

EVIDENCE

Literature published to March 2022 was reviewed. PubMed, CINAHL, and the Cochrane Library were used to search for systematic reviews, randomized control trials, and observational studies on cervical ripening and induction labour. Grey (unpublished) literature was identified by searching the websites of health technology assessment and health technology related agencies, clinical practice guideline collections, clinical trial registries, and national and international medical specialty societies.

VALIDATION METHODS

The authors rated the quality of evidence and strength of recommendations using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) approach. See online Appendix A (Tables A1 for definitions and A2 for interpretations of strong and conditional [weak] recommendations).

INTENDED AUDIENCE

All providers of obstetrical care.

SUMMARY STATEMENTS

Misoprostol OXYTOCIN: RECOMMENDATIONS.

Artificial rupture of membranes as a mode for induction of labor in women with a previous cesarean section- a retrospective cohort study

BACKGROUND

Induction of labor in women with a previous cesarean section (CS) is associated with increased rates of uterine rupture and failed attempt for vaginal delivery. Prostaglandins use is contraindicated in this population, limiting available options for cervical ripening.

OBJECTIVE

To evaluate the efficacy and safety of artificial rupture of membranes (AROM) as a mode of Induction of labor (IOL) in women with a previous cesarean section.

METHODS

A retrospective cohort study conducted in a single tertiary care center between January 2015 and October 2020. Women with one previous cesarean section and a current singleton term pregnancy requiring IOL, with an unfavorable cervix, were included. The primary outcome was a successful vaginal delivery (VBAC); secondary outcomes were rates of chorioamnionitis, uterine rupture and low Apgar score (< 7).

RESULTS

Of the 665 women who met the inclusion criteria, 492 (74%) did not receive subsequent oxytocin and 173 (26%) did. There were significant differences in the baseline characteristics between these two groups, including maternal age, cervical dilation at presentation, parity, and a history of a previous VBAC. Among women who were induced solely by AROM the rate of a successful TOLAC was higher (81.3% vs 73.9%), total time of IOL was shorter (mean 8.7 h vs.16.1 h) and the risk of chorioamnionitis was lower (7.3% vs 18.4%). When subdividing the women who received oxytocin into early (< 12 h after AROM) vs late (> 12 h after AROM) administration, there were no significant changes in the rates of successful VBAC or of chorioamnionitis.

CONCLUSION

AROM as a single mode of IOL in women with a previous CS is a safe and efficient practice with high rates of successful VBAC. When spontaneous labor does not develop, there is no advantage to delay the administration of oxytocin.

Survey of mode of delivery and maternal and perinatal outcomes in Canada

OBJECTIVE

To identify determinants of cesarean delivery (CD) and examine associations between mode of delivery (MOD) and maternal and perinatal outcomes.

METHODS

We conducted a retrospective analysis of a Canadian multicentre birth cohort derived from provincial data collected in 2008/2009. Maternal and perinatal characteristics and outcomes were compared between vaginal and cesarean birth and between the following MOD subgroups: spontaneous vaginal delivery (VD), assisted VD, planned cesarean delivery (CD), and intrapartum CD. Multivariate regression identified determinants of CD and the effects of MOD and previous CD on maternal and perinatal outcomes.

RESULTS

The cohort included 264 755 births (72.1% VD and 27.9% CD) from 91 participating institutions. Determinants of CD included maternal age, parity, previous CD, chronic hypertension, diabetes, urinary tract infection or pyelonephritis, gestational hypertension, vaginal bleeding, labour induction, preterm gestational age, low birth weight, large for gestational age, malpresentation, and male sex. CD was associated with greater risk of maternal and perinatal morbidity and mortality. Subgroup analysis demonstrated higher risk of adverse pregnancy outcomes with assisted VD and intrapartum CD than spontaneous VD. Planned CD reduced the risk of obstetric wound hematoma and perinatal mortality but increased maternal and neonatal morbidity. Previous CD increased the risk of maternal and neonatal morbidity among multiparous women.

CONCLUSIONS

The CD rate in Canada is consistent with global trends reflecting demographic and obstetric intervention factors. The risk of adverse pregnancy outcomes with CD warrants evaluation of interventions to safely prevent nonessential cesarean birth.

Is there an optimal inter-delivery interval in women who underwent trial of labor after cesarean delivery (TOLAC)?

Background

Inter-delivery interval (IDI) has been proven to be a factor associated with adverse maternal and neonatal outcomes. However, the optimal IDI in trial of labor after cesarean delivery (TOLAC) remains unclear. We aimed to investigate the association between IDI and major maternal and neonatal outcomes in women who underwent TOLAC.

Methods

A multicenter, retrospective cohort study including five hospitals was conducted between January 2018 and December 2019 in Foshan, China. This study included 1080 pregnant women with one or two cesarean deliveries who attempted a TOLAC. Data on maternal and neonatal outcomes were collected from the electronic record system. Maternal and neonatal outcomes in different groups of IDI were compared by univariate and multivariable analyses.

Results

A short IDI of < 24 months did not show a statistically significant association with uterine rupture in the univariate analysis (P = 0.668). In multivariable analysis, the incidences of postpartum hemorrhage (OR 19.6, 95% CI:4.4–90.9, P < 0.05), preterm birth (OR 5.5, 95% CI:1.5–21.3, P < 0.05), and low birth weight (OR 3.5, 95% CI:1.2–10.3, P < 0.05) were significantly increased in women with an IDI of < 24 months than in those with a normal interval (24–59 months). Infection morbidity (OR 1.8, 95% CI:1.4–7.9, P < 0.05), transfusion (OR 7.4, 95% CI:1.4–40.0, P < 0.05), and neonatal unit admission (OR 2.6, 95% CI:1.4–5.0, P < 0.05) were significantly increased in women with an IDI of 120 months or more than in those with a normal interval. Postpartum hemorrhage (P = 0.062) had a trend similar to that of a significant IDI of 120 months or more. We found no statistically significant difference in maternal and neonatal outcomes between 24–59 months and 60–119 months.

Conclusions

An IDI of less than 24 months or 120 months or more increased the risk of major maternal and neonatal outcomes. We recommend that the optimal interval for women who underwent TOLAC should be 24 to 119 months.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12978-021-01319-0.

An inter-delivery interval (IDI) that is too short or too long increases the risk of adverse maternal and neonatal outcomes. However, the optimal IDI for trial of labor after cesarean delivery (TOLAC) remains unclear. We performed a multicenter, electronic medical record-based, retrospective cohort study that included 1080 pregnant women who had one or two cesarean deliveries and underwent TOLAC. Data on maternal and neonatal outcomes were collected from the electronic record system. In multivariable analysis, the incidences of postpartum hemorrhage, preterm birth, and low birth weight were significantly increased in women with an IDI of < 24 months than in those with a normal interval (24–59 months). Infections, transfusion, and neonatal unit admission were significantly increased in women with an IDI of ≥ 120 months than in those with a normal interval. In conclusion, we found that an IDI < 24 months or ≥ 120 months increased the risk of major maternal and neonatal outcomes. We recommend that the optimal interval for women who underwent TOLAC should be 24 to 119 months.

Induction of labour in patients with prior caesarean births or uterine surgery

The current evidence favours trial of labour after one caesarean in the absence of any other contraindications, recognizing that risks with both trial of labour after caesarean (TOLAC) and elective repeat caesarean section (ERCS) birth are relatively uncommon. When the need for induction of labour (IOL) following a previous caesarean arises, shared decision-making should be based on the current available evidence. This approach, however, needs to be tailored, taking into account the individual's history, initial examination and response to the ongoing process of induction to optimize the maternal and foetal outcomes. This paper aims to review the evidence and provide guidance on decision making surrounding labour induction in a pregnancy following a prior caesarean or uterine surgery.

Healthcare Practitioners' Attitudes and Knowledge Regarding Trial of Labour After Caesarean Delivery (TOLAC): a survey of Canadian obstetrical care providers

OBJECTIVES

To understand current attitudes and practice patterns of obstetrical care providers regarding trial of labour after cesarean (TOLAC) and to assess misconceptions regarding eligibility for and risks associated with TOLAC.

METHODS

A survey was developed based on published literature, validated by a statistician, and piloted with Canadian obstetricians. French and English versions were distributed via the mailing list of the Society of Obstetricians and Gynaecologists of Canada and social media. Practising obstetrical care providers with an office antenatal practice were eligible to participate. Data were analyzed using descriptive statistics and correlational and multiple regression analyses.

RESULTS

A total of 381 people responded, with representation from every Canadian province and territory. Obstetrician-gynaecologists (239, 63%), family physicians (100, 26%), and midwives (42, 11%) responded. Most participants (277, 78%) thought that TOLAC should be actively encouraged. Only 141 (40%) used a decision aid when counselling patients, although most respondents (250, 71%) thought it would be useful. Providers were less comfortable offering oxytocin induction compared with cervical foley or amniotomy (P < 0.001) and offering TOLAC to patients with an unknown uterine scar (P < 0.001). Providers in western Canada reported more comfort offering TOLAC to patients with more than 1 previous cesarean delivery compared with other regions. Two hundred nine participants (62%) reported that they had had at least 1 patient with a uterine rupture, with the minority of cases (13, 6%) resulting in litigation.

CONCLUSIONS

This study offers new information on current national practice patterns and provider attitudes regarding TOLAC. These results can be used to guide future educational initiatives to increase TOLAC rates.

When there is only one patient: Induction of labour for termination of pregnancy

Induction of labour when no live birth is anticipated presents a number of unique considerations for members of the healthcare team. The main indication for Induction of Labour for Termination of Pregnancy (iTOP) is intrauterine fetal death (IUFD) beyond a gestational age where surgical management is available, but may also be indicated in the setting of induction abortion (with or without feticide), and termination of pregnancy (with or without infant palliation) for pregnancies where a lethal fetal anomaly is diagnosed. In tertiary care centres, iTOP may represent a significant proportion of labouring patients. Despite this, there are few guidelines dedicated specifically to iTOP in either obstetrical or family planning specialties. In this article, we will consider four main themes from an evidence-informed perspective: method selection; pre-induction preparation; clinical considerations during and after iTOP; and complications management.

Trial of labor after cesarean in primiparous women with fetal macrosomia

KEY MESSAGE

Spontaneous labor onset, epidural anesthesia and prior cesarean for non-arrest disorders are strong predictors of successful vaginal birth after cesarean in women delivering a macrosomic fetus.

PURPOSE

Lower rates of successful vaginal birth after cesarean in association with increasing birthweight were previously reported. We aimed to determine the factors associated with successful trial of labor after cesarean (TOLAC) among primiparous women with fetal macrosomia.

METHODS

A retrospective cohort study conducted during 2005-2019 at two university hospitals, including all primiparous women delivering a singleton fetus weighing ≥ 4000 g, after cesarean delivery at their first delivery. A multivariate analysis was performed to evaluate the characteristics associated with TOLAC success (primary outcome).

RESULTS

Of 551 primiparous women who met the inclusion criteria, 50.1% (n = 276) attempted a TOLAC and 174 (63.0%) successfully delivered vaginally. In a multivariate analysis, spontaneous onset of labor (aOR [95% CI] 3.68 (2.05, 6.61), P < 0.001), epidural anesthesia (aOR [95% CI] 2.38 (1.35, 4.20), P = 0.003) and history of cesarean delivery due to non-arrest disorder (aOR [95% CI] 2.25 (1.32, 3.85), P = 0.003) were the only independent factors associated with TOLAC success. Successful TOLAC was achieved in 82.0% (82/100) in the presence of all three favorable factors, 61.3% (65/106) in the presence of two factors and 38.6% (27/70) in the presence of one or less of these three factors (P < 0.001).

CONCLUSION

Spontaneous onset of labor, epidural anesthesia and prior cesarean delivery due to non-arrest disorders were independently associated with higher vaginal birth after cesarean rate among women with fetal macrosomia, with an overall favorable success rate in the presence of these factors. These findings should be implemented in patient counseling in those contemplating a vaginal birth in this setting.

Impact of third-trimester measurement of low uterine segment thickness and estimated fetal weight on perinatal morbidity in women with prior cesarean

OBJECTIVES

This study aimed to estimate the impact of third-trimester ultrasound with measurement of the lower uterine segment thickness (LUST) and estimation of fetal weight (EFW) on maternal and perinatal morbidity among women with a prior cesarean delivery.

METHODS

We performed a secondary analysis of the QUARISMA trial, including women who delivered at term after 1 prior cesarean delivery in tertiary care centres. Major and minor maternal and perinatal morbidities were compared between centres that had introduced LUST and EFW measurements into routine practice and those that had not, using generalized estimating equations and adjusted odds ratios (aOR). In a secondary analysis, we compared women who underwent a trial of labour with and without LUST and EFW measurements.

RESULTS

We observed a significant reduction in major perinatal morbidity (aOR 0.52; 95% CI 0.28-0.96, P = 0.04), minor perinatal morbidity (aOR 0.49; 95% CI 0.25-0.96, P = 0.04), and minor maternal morbidity (aOR 0.56; 95% CI 0.34- 0.94, P = 0.03) but no significant difference in major maternal morbidity (aOR 0.40; 95% CI 0.04-3.69, P = 0.42) in the 2 centres that had introduced third-trimester ultrasound with EFW and LUST measurements (1458 women), compared with the 4 centres (1247 women) that had not. Among women who underwent a trial of labour, we observed a reduction in major perinatal morbidity (aOR 0.25; 95% CI 0.11-0.54, P < 0.001) and a lower rate of uterine rupture (0% vs. 0.3%, P = 0.045) with LUST and EFW measurements.

CONCLUSION

Third-trimester ultrasound with EFW and LUST measurement is associated with a significant reduction in major perinatal morbidity in women with a prior caesarean delivery.

Risk management of vaginal birth after cesarean section (Review)

The increasing number of patients who desire to experience vaginal birth after cesarean (VBAC) and the optimized protocols for trial of labor after cesarean (TOLAC) has led to a shift of old obstetrical paradigms. The VBAC trend is accompanied with numerous challenges for healthcare professionals, from establishing suitability of each pregnant patient profile for TOLAC to active labor management, and ethical or legal issues, which occasionally are not included in specific guidelines. That is why an individualized risk assessment and management can serve obstetricians as a useful tool for improving outcomes of patients, satisfaction, and also for avoiding legal or moral liabilities. The risk management concept aims to reduce foreseen risks and to emulate strategies for prediction and prevention of unwanted events. In obstetrics, and particularly for the VBAC topic, this concept is relatively new and undefined, and thus its features are disparate between guideline recommendations and clinical studies. This narrative review intends to offer a new and organic perspective over clinical aspects of TOLAC and VBAC risk management.

Perinatal outcomes of planned home birth after cesarean and planned hospital vaginal birth after cesarean at term gestation in British Columbia, Canada: A retrospective population-based cohort study

BACKGROUND

The aim of this retrospective population-based cohort study was to determine whether the mode of delivery and maternal and neonatal outcomes differ between planned home VBAC (HBAC) and planned hospital VBAC.

METHODS

All midwifery clients with at least one prior cesarean birth delivered between April 2000 and March 2017 (N = 4741; n = 4180 planned hospital VBAC, n = 561 planned HBAC) were included. Multivariate binomial logistic regression analyses were conducted to calculate the odds ratios adjusted for the potential covariates. The primary outcome was the mode of delivery, and the secondary outcomes were uterine rupture/dehiscence, postpartum hemorrhage, nonintact perineum, episiotomy, obstetric trauma, Apgar score <7 at 5 minutes, neonatal resuscitation requiring positive pressure ventilation, neonatal intensive care unit admission, and a composite outcome of severe neonatal mortality and morbidity and maternal mortality and morbidity.

RESULTS

Planned HBAC was associated with a significant 39% decrease in the odds of having a cesarean birth (aOR 0.61, 95% CI 0.47-0.79) adjusting for the prepregnancy and pregnancy characteristics. Severe adverse outcomes were relatively rare in both settings; thus, our study did not have sufficient power to detect the true differences associated with the place of birth.

CONCLUSIONS

Home births for those eligible for VBACs and attended by registered midwives within an integrated health system were associated with higher vaginal birth rates compared with planned hospital VBACs. Severe adverse outcomes were relatively rare in both settings.

Changes in lower uterine segment thickness during different gestational weeks in pregnant women qualified for trial of labor after cesarean section

Objective

To investigate the correlation between lower uterine segment thickness (LUST) and gestational weeks (GW) in women who attempted trial of labor after cesarean section (TOLAC) and to estimate the reference ranges of LUST.

Methods

A prospective cohort study was conducted between January 2019 and December 2020 at a tertiary‐care center in Foshan, China. A total of 2588 women who attempted TOLAC were included. LUST was measured in different trimesters using transabdominal ultrasound. Histograms were used to review the mean and standard deviations (SD) of LUST at different GW.

Results

The mean LUST of the patients were 6.90 ± 2.86, 4.36 ± 1.87, 2.83 ± 0.65, and 2.57 ± 0.51 mm in the first (12.10 ± 1.28 weeks), second (21.79 ± 3.40 weeks), middle third (34.28 ± 2.64 weeks), and late third (38.20 ± 1.00 weeks) trimesters, respectively. An inverse correlation was noted between LUST and uterine rupture in women who underwent a planned ERCD (P < 0.001), but not in women who attempted TOLAC during the late third trimester (P = 0.629).

Conclusion

LUST is inversely correlated with GW and decreases faster in the first and second trimesters than in the middle and late third trimesters. TOLAC should be approached with caution for pregnant women with a thin myometrium in late third trimester.

Lower uterine segement thickness measured by ultrasound is inversely correlated with gestation and decreases faster in the first two trimesters than in the third trimester.

A survey of health care practitioners' attitudes toward shared decision-making for choice of next birth after cesarean

BACKGROUND

Patients with a history of cesarean may benefit from shared decision-making (SDM) interventions, such as patient decision aids, that provide individualized clinical information and help to clarify personal preferences. We sought to understand the factors that influence how care practitioners support choices for mode of birth and what individual and health system factors influence uptake of SDM in routine care.

METHODS

We conducted a cross-sectional survey of health care practitioners in British Columbia, Canada (2016-2017). Participants included family physicians, midwives, obstetricians, and registered nurses. We conducted descriptive and inferential analyses of quantitative data and subjected the open-ended survey responses to thematic analysis.

RESULTS

Analysis of survey responses (n = 307) suggested there was no significant association between the size of the participant hospital and their medico-legal concerns about mode of birth. Environmental factors that may influence the use of SDM included the length of time it takes to initiate an emergency cesarean and the timing of when the SDM intervention is introduced to the patient. No participants reported protocols prohibiting VBAC at their hospital. Participants preferred an SDM approach where the pregnant person is involved in making the final decision for mode of birth.

CONCLUSIONS

Although maternity care practitioners express attitudes and behaviors that may support SDM for mode of birth after cesarean, implementing SDM using a patient decision aid alone may be challenging because of environmental factors. Our study demonstrates how survey data can aid in identifying how, when, where, for whom, and why an SDM intervention could be implemented.

Labour Management in Trial of Labour After Cesarean Delivery (TOLAC): A Gap Analysis and Quality Improvement Initiative

OBJECTIVE

This quality improvement (QI) initiative was designed to identify gaps between evidence-based or hospital recommendations for trial of labour after cesarean delivery (TOLAC) labour management and clinical practice.

METHODS

Viable, singleton pregnancies from January 1, 2016, to December 31, 2018, undergoing TOLAC were extracted from the electronic medical record. Sixty randomly selected charts were reviewed for (1) consent, (2) induction methods, (3) oxytocin use, (4) continuous fetal monitoring, (5) admission indication, (6) examination regularity, (7) duration of dystocia before decision to perform cesarean delivery (CD), and (8) maternal complications.

RESULTS

The institutional vaginal birth after cesarean rate was 71%. Documented consent to TOLAC on admission was present in 50% of cases. Oxytocin augmentation was used in 38% of cases, and the median maximum dose was 4 mU/min (interquartile range [IQR] 3-7.5 mU/min). Delays in initiating oxytocin were identified in 47% of those patients. Decisions to deliver by cesarean were made after a median time of 5 hours and 40 minutes (IQR 3 hours and 30 minutes to 6 hours and 35 minutes) of failure to progress despite adequate contractions. After this decision, median time to delivery was 1 hour and 11 minutes (IQR 57 minutes to 2 hours and 16 minutes). Complications included postpartum hemorrhage (5%) and chorioamnionitis (6.7%). Surgical injury occurred in 10% of intrapartum CD. Peripartum complications were associated with delay in oxytocin implementation (χ² (1) = 9.80; P < 0.001) in secondary analysis.

CONCLUSION

Areas for QI were identified in (1) consent, (2) duration of dystocia before decision to proceed with CD and delay to CD, and (3) peripartum complications. We recognize the potential use of this as a tool to identify areas for QI and prospective study.

Revisiting the Care Pathway for Trial of Labour After Cesarean: The Decision-to-Delivery Interval Is Key

Centres providing maternity care and offering a trial of labour after cesarean must develop and use maternal educational and consent processes that emphasize choice and autonomy related to options for and decisions surrounding vaginal birth after cesarean and elective repeat cesarean delivery. These centres should have administrative systems and processes that take into account local resources for cesarean delivery services, including team-based complex maternity risk support and an urgency consensus on the fetal, maternal, and maternal-fetal indications for a surgical delivery to ensure an appropriate decision-to-delivery interval.

Counselling Patients for Trial of Labour after Cesarean (TOLAC) and Invasive Placentation: Are We Missing the Mark? The Importance of Local Data and Informed Choice

OBJECTIVE

Rates of cesarean delivery are increasing, and these procedures carry potential complications, like the risk of invasive placentation, which increases with each cesarean. A trial of labour after cesarean (TOLAC) is a viable option for patients; however, it has been associated with uterine rupture, a complication with maternal and fetal risks. To better counsel patients considering TOLAC, we aimed to determine local uterine rupture rates and maternal and neonatal outcomes with TOLAC and compare these with outcomes related to invasive placentation.

METHODS

A 4-year retrospective chart review was conducted at our tertiary centre of all patients with a history of a previous cesarean delivery. We assessed rates of TOLAC, vaginal delivery after cesarean (VBAC), and uterine rupture, as well as maternal and neonatal outcomes associated with invasive placentation. Cases of uterine rupture from 1988 to the present were also reviewed, and their outcomes were compared with those of invasive placentation.

RESULTS

Our uterine rupture rate was 0.44% and VBAC rate was 73.8%. We identified 8 cases of uterine rupture since 1988 and 67 invasive placentas during the 4-year chart review. Invasive placentation was associated with a significantly increased risk of neonatal respiratory morbidity, hysterectomy, maternal complications, and longer length of maternal hospital stay when compared with uterine rupture.

CONCLUSION

While uterine rupture remains a potential complication of TOLAC, it is rare with overall excellent maternal and neonatal outcomes. Invasive placentation, the risk of which increases with cesarean delivery, carries potentially higher complication rates than uterine rupture. Local complication data is important for individual sites offering TOLAC. The implications of invasive placentation cannot be overlooked when counselling patients considering TOLAC.

Factors obstetricians, family physicians and midwives consider when counselling women about a trial of labour after caesarean and planned repeat caesarean: a qualitative descriptive study

Background

Repeat caesarean sections (CSs) are major contributors to the high rate of CS in Canada and globally. Women’s decisions to have a planned repeat CS (PRCS) or a trial of labour after CS (TOLAC) are influenced by their maternity care providers. This study explored factors maternity care providers consider when counselling pregnant women with a previous CS, eligible for a TOLAC, about delivery method.

Methods

A qualitative descriptive design was implemented. Semi-structured, one-to-one in-depth telephone interviews were conducted with 39 maternity care providers in Ontario, Canada. Participants were recruited at 2 maternity care conferences and with the use of snowball sampling. Interviews were audio recorded and transcribed verbatim. Data were uploaded into the data management software, NVIVO 10.0 and analyzed using qualitative content analysis.

Results

Participants consisted of 12 obstetricians, 13 family physicians and 14 midwives. Emergent themes, reflecting the factors maternity care providers considered when counselling on mode of delivery, were organized under the categories clinical/patient factors, health system factors and provider preferences. Maternity care providers considered clinical/patient factors, including women’s choice … with conditions, their assessment of women’s chances of a successful TOLAC, their perception of women’s risk tolerance, women’s preferred delivery method, and their perception of women’s beliefs and attitudes about childbirth. Additionally, providers considered health system factors which included colleague support for TOLAC and time needed to mount an emergency CS. Finally, provider factors emerged as considerations when counselling. They included provider preference for PRCS or TOLAC, provider scope of practice, financial incentives and convenience related to PRCS, past experiences with TOLAC and PRCS and providers’ perspectives on risk of TOLAC.

Conclusion

The findings highlight the multiplicity of factors maternity care providers consider when counselling women. Effectively addressing clinical, health care system and personal factors that influence counselling may help decrease non-medically indicated PRCS.

Clinical interventions that influence vaginal birth after cesarean delivery rates: Systematic Review & Meta-Analysis

BACKGROUND

To systematically review the literature on clinical interventions that influence vaginal birth after cesarean (VBAC) rates.

METHODS

We searched Ovid Medline, Ovid Embase, Wiley Cochrane Library, CINAHL via EBSCOhost; and Ovid PsycINFO. Additional studies were identified by searching for clinical trial records, conference proceedings and dissertations. Limits were applied for language (English and French) and year of publication (1985 to present). Two reviewers independently screened comparative studies (randomized or non-randomized controlled trials, and observational designs) according to a priori eligibility criteria: women with prior cesarean sections; any clinical intervention or exposure intended to increase the VBAC rate; any comparator; and, outcomes reporting VBAC, uterine rupture and uterine dehiscence rates. One reviewer extracted data and a second reviewer verified for accuracy. Meta-analysis was conducted using Mantel-Haenszel (random effects model) relative risks (VBAC rate) and risk differences (uterine rupture and dehiscence). Two reviewers independently conducted methodological quality assessments using the Mixed Methods Appraisal Tool (MMAT).

RESULTS

Twenty-nine studies (six trials and 23 cohorts) examined different clinical interventions affecting rates of vaginal deliveries among women with a prior cesarean delivery (CD). Methodological quality was good overall for the trials; however, concerns among the cohort studies regarding selection bias, comparability of groups and outcome measurement resulted in higher risk of bias. Interventions for labor induction, with or without cervical ripening, included pharmacologic (oxytocin, prostaglandins, misoprostol, mifepristone, epidural analgesia), non-pharmacologic (membrane sweep, amniotomy, balloon devices), and combined (pharmacologic and non-pharmacologic). Single studies with small sample sizes and event rates contributed to most comparisons, with no clear differences between groups on rates of VBAC, uterine rupture and uterine dehiscence.

CONCLUSIONS

This systematic review evaluated clinical interventions directed at increasing the rate of vaginal delivery among women with a prior CD and found low to very low certainty in the body of evidence for cervical ripening and/or labor induction techniques. There is insufficient high-quality evidence to inform optimal clinical interventions among women attempting a trial of labor after a prior CD.