Previous mode of delivery and pregnancy outcomes after single euploid embryo transfer: A retrospective study

RESEARCH QUESTION

Are the pregnancy outcomes (clinical, biochemical and ectopic pregnancies) of women with a history of vaginal birth and women with a history of caesarean section who underwent single euploid embryo transfer at Fakih IVF Fertility Centre comparable?

DESIGN

This retrospective cross-sectional chart review with multi-variate analysis, including 1157 women, compared pregnancy outcomes between women with a history of caesarean section and women with a history of vaginal birth who underwent in-vitro fertilization (IVF) at Fakih IVF Fertility Centre. All women who underwent single euploid frozen embryo transfer were included. Fresh and multiple embryo transfers were excluded. The primary outcome was clinical pregnancy, and the secondary outcomes were biochemical and ectopic pregnancies.

RESULTS

Regarding pregnancy outcomes, the caesarean section group had fewer clinical pregnancies than the vaginal birth group [299 (61.1 %) vs 417 (67.3 %); p = 0.0346]. The rate of ectopic pregnancy did not differ significantly between the two groups (p = 0.4320). Similarly, there was no significant difference between the two groups regarding biochemical pregnancy [caesarean section group 22 (4.3 %) vs vaginal birth group 26 (4.0 %); p = 0.8122].

CONCLUSION

This study showed a decreased likelihood of clinical pregnancy in women with a history of caesarean section. No significant differences in biochemical or ectopic pregnancies were observed between the groups. These findings have practical clinical implications for counselling patients on the impact of prior caesarean sections in assisted reproduction.

Perinatal factors associated with admission to neonatal intensive care unit following cesarean delivery in Kano, northern Nigeria

OBJECTIVES

Cesarean section is the most common obstetric surgical procedure, with associated risks for adverse neonatal outcomes. The interplay of perinatal factors associated with neonatal admissions following cesarean delivery remains poorly understood in developing countries. We examined how perinatal and facility-based factors affect Neonatal Intensive Care Unit (NICU) admission after cesarean delivery in northern Nigeria.

METHODS

A prospective cohort study involving 200 women undergoing cesarean section were consecutively enrolled with subsequent follow-up of their infants in the post-natal period. Data were abstracted from the medical record using an interviewer-administered questionnaire. The primary outcomes were NICU admission and intrauterine or early neonatal deaths. Binary logistic regression modelling was used to identify variables independently associated with the outcomes.

RESULTS

Over the study period (six months), there were 200 cesarean sections. A total of 30 (15.0%) neonates were admitted into the NICU following the procedure. No stillbirths or early neonatal deaths were recorded. NICU admission was associated with gestational age (preterm vs. term [adjusted odds ratio, aOR: 18.9, 95% confidence interval (CI): 4.0-90.4]), birth weight (small vs. appropriate [aOR: 6.7, 95% CI 1.9-22.7] and large vs. appropriate birth weight [aOR: 20.3, 95% CI 2.9-143.7]) and the number of indications for cesarean section (≥2 vs. one [aOR: 0.2, 95% 0.1-0.8]).

CONCLUSIONS

Prematurity, small and large for gestational age neonates; and indications for cesarean section were associated with increased likelihood of neonatal admission following cesarean delivery. These findings could inform ongoing quality enhancement initiatives to improve NICU admission outcomes at the study site, and other similar settings.

Reproductive and pregnancy outcomes following embryo transfer in women with previous cesarean section: A systematic review and meta-analysis

INTRODUCTION

Cesarean section affects subsequent spontaneous pregnancies because of implantation issues. However, its impact on post-embryo transfer pregnancies is still debated. This review aimed to evaluate the impact of a previous cesarean section on fertility and pregnancy outcomes of women undergoing fresh or frozen embryo transfer.

MATERIAL AND METHODS

MEDLINE, Scopus, ClinicalTrials.gov, Scielo, EMBASE, Cochrane Library at the CENTRAL, and LILACS were searched from inception to February 2021. Studies were included if they evaluated reproductive or pregnancy outcomes after fresh or frozen embryo transfer in infertile women with a previous cesarean section relative to women with a previous vaginal delivery. Random-effect meta-analyses to calculate risk ratio (RR) or mean differences with 95% confidence intervals (CI) followed by subgroup analysis for fresh and frozen embryo transfer were performed. Risk of bias and quality assessment were conducted using Newcastle-Ottawa scale and GRADE criteria. The review was registered in the International Prospective Register of Systematic Reviews (CRD42021226297).

RESULTS

Ten studies, with data provided for 13 696 participants, were eligible. For embryo transfers after cesarean section, compared with vaginal delivery, there was a significant reduction of the live birth rate (RR 0.88, 95% CI 0.79-0.99) and biochemical pregnancy rate (RR 0.89, 95% CI 0.82-0.96). No statistically significant differences were found for clinical pregnancy rate (RR 0.92, 95% CI 0.84-1.02), ectopic pregnancies (RR 1.00, 95% CI 0.68-1.46), pregnancy loss (RR 1.05, 95% CI 0.94-1.18), multiple pregnancies (RR 0.80, 95% CI 0.63-1.02), stillbirths (RR 0.86, 95% CI 0.27-2.69), birth defects (RR 1.71, 95% CI 0.49-5.96) or birthweight (mean difference 46.82, 95% CI -40.16 to 133.80). Subgroup analysis revealed an increased risk for preterm birth in post-cesarean section fresh embryo transfer pregnancies (RR 1.59, 95% CI 1.16-2.19).

CONCLUSIONS

Low-grade evidence shows that post-embryo transfer pregnancies in infertile women who had a previous cesarean delivery result in reduced biochemical pregnancy and live birth rates relative to women with a previous vaginal delivery. An increased risk for preterm birth is notable in post-fresh embryo transfer pregnancies.

Isthmocele and ovarian stimulation for IVF: considerations for a reproductive medicine specialist

STUDY QUESTION

What is the risk of developing intracavitary fluid (ICF) during ovarian stimulation in patients with an isthmocele after previous caesarean section (CS) delivery?

SUMMARY ANSWER

In patients with an existing isthmocele, the risk of developing ICF during hormonal stimulation for IVF is almost 40%; therefore, special attention has to be paid to exclude fluid accumulation during stimulation and particularly at the time of transfer, in which case the reproductive outcomes of frozen embryo transfer (FET) cycles appear to be uncompromised.

WHAT IS KNOWN ALREADY

Lately, there is an increasing focus on the long-term impact of CS delivery on the health and future fertility of the mother. Development of an isthmocele is one of the sequelae of a CS delivery. The presence of ICF in combination with an isthmocele has been described previously, and the adverse effect of endometrial fluid on implantation is well recognised by reproductive medicine specialists. Accumulation of ICF has been previously described in patients with hydrosalpinx, less commonly in patients with polycystic ovary syndrome undergoing ovarian stimulation for IVF/ICSI, and even in some patients without any identifiable reason. Assisted reproductive techniques (ARTs) are a means to overcome infertility. Reproductive medicine specialists commonly see patients with secondary infertility with a history of having had one or more previous CS and with ultrasound confirmation of an isthmocele. However, the available data pertaining to the prevalence of intracavitary fluid during ovarian stimulation in patients with ultrasound confirmation of an isthmocele is limited. Furthermore, data on the influence of ICF in a stimulated cycle on the ART outcome of a subsequent FET cycle is scarce and merits further studies.

STUDY DESIGN, SIZE, DURATION

A prospective observational exploratory study was performed in IVI Middle East Fertility Clinic, Abu Dhabi, from June 2018 to March 2019, and retrospective analysis of the reproductive outcomes was performed until July 2019.

PARTICIPANTS/MATERIALS, SETTING, METHODS

Patients with secondary infertility, defined as a minimum of 1 year of infertility after a previous successful pregnancy, undergoing ovarian stimulation for IVF/ICSI and having a history of one or more previous CS with ultrasonographic visible isthmocele, were included (n = 103). Patients were monitored as a clinical routine with vaginal ultrasound examinations during ovarian stimulation for IVF/ICSI treatment. All patients included in the study were asked to complete a questionnaire regarding their previous obstetric history. Development of ICF was recorded as well as changes in the measurements of the isthmocele during the course of ovarian stimulation. Reproductive outcomes of FET cycles of the patients with an isthmocele were retrospectively compared to those of patients with infertility and without isthmocele in our clinic during the same time period.

MAIN RESULTS AND THE ROLE OF CHANCE

Patients with an existing isthmocele after previous CS have a risk of ~40% of developing ultrasonographic visible fluid in the endometrial cavity during the course of ovarian stimulation. Development of ICF was significantly correlated with the depth of the isthmocele on Day 2/3 (P = 0.038) and on the day of trigger (−1/−2 days) (P = 0.049), circumference of the isthmocele on the day of trigger (−1/−2 days) (P = 0.040), distance from the C-scar to the external os (P = 0.036), number of children delivered (P = 0.047) and number of previous CS (P = 0.035). There was a statistically significant increase in the parameters related to the size of the isthmocele during ovarian stimulation. No significant differences in the reproductive outcome (pregnancy rate and rates of biochemical and ectopic pregnancies, miscarriages and ongoing/delivered pregnancies) after FET were found between the patients with and without an isthmocele, when ICF was excluded prior to embryo transfer procedure.

LARGE-SCALE DATA

NA.

LIMITATIONS, REASONS FOR CAUTION

This study was not primarily designed to investigate the causes of ICF during ovarian stimulation or to evaluate the reproductive outcomes. Further, the small number of reported reproductive outcomes may be seen as a limitation.

WIDER IMPLICATIONS OF THE FINDINGS

The data highlights the need for an increased awareness on the part of reproductive medicine specialists towards the potentially adverse impact of an isthmocele on ART treatment, as there is a potential to develop intracavitary fluid during ovarian stimulation for IVF. The increase in the circumference of the isthmocele may increase embryo transfer difficulty.

STUDY FUNDING/COMPETING INTEREST(S)

No funding of the study has to be reported. The authors have no competing interests.

TRIAL REGISTRATION NUMBER

This prospective study was registered with clinicaltrials.gov. under the number NCT03518385.

Caesarean section and subsequent ectopic pregnancy: a systematic review and meta-analysis

BACKGROUND

Caesarean section rates are increasing worldwide, and the long-term effects are unknown.

OBJECTIVE

To evaluate the risk of subsequent ectopic pregnancy in women with a previous caesarean section, compared with vaginal delivery.

SEARCH STRATEGY

Systematic review of the literature using CINAHL, the Cochrane Library, Embase, Medline, PubMed, SCOPUS and Web of Knowledge, published from 1945 until 17 July 2011.

SELECTION CRITERIA

Cohort and case-control designs reporting on the mode of delivery and subsequent ectopic pregnancy. Two reviewers independently assessed the titles, abstracts, and full articles to identify eligible studies, using a standardised data collection form, and also assessed the study quality. Reference lists of the studies included were also cross-checked.

DATA COLLECTION AND ANALYSIS

Odds ratios (ORs) were combined using a random-effect model to estimate the overall association between caesarean section delivery and the risk of subsequent ectopic pregnancy.

MAIN RESULTS

Thirteen studies were included, which recruited a total of 61,978 women. Five studies reported adjustment for confounding factors, and the pooled OR of subsequent ectopic pregnancy following a caesarean section was 1.05 (95% CI 0.51-2.15). The removal of one study that reported outlier results yielded a pooled OR of 0.82 (95% CI 0.42-1.61). The pooled crude OR for all 13 studies was 1.36 (95% CI 0.99-1.88).

AUTHOR'S CONCLUSIONS

This review found no evidence of an association between prior caesarean section delivery and the occurrence of a subsequent ectopic pregnancy, but the studies included were of poor or variable quality, and only a small number adjusted for potential confounding factors. Further research of a higher methodological quality is required to assess any potential association between mode of delivery and subsequent ectopic pregnancy.

Caesarean delivery and subsequent stillbirth or miscarriage: systematic review and meta-analysis

OBJECTIVE

To compare the risk of stillbirth and miscarriage in a subsequent pregnancy in women with a previous caesarean or vaginal delivery.

DESIGN

Systematic review of the published literature including seven databases: CINAHL; the Cochrane library; Embase; Medline; PubMed; SCOPUS and Web of Knowledge from 1945 until November 11(th) 2011, using a detailed search-strategy and cross-checking of reference lists.

STUDY SELECTION

Cohort, case-control and cross-sectional studies examining the association between previous caesarean section and subsequent stillbirth or miscarriage risk. Two assessors screened titles to identify eligible studies, using a standardised data abstraction form and assessed study quality.

DATA SYNTHESIS

11 articles were included for stillbirth, totalling 1,961,829 pregnancies and 7,308 events. Eight eligible articles were included for miscarriage, totalling 147,017 pregnancies and 12,682 events. Pooled estimates across the stillbirth studies were obtained using random-effect models. Among women with a previous caesarean an increase in odds of 1.23 [95% CI 1.08, 1.40] for stillbirth was yielded. Subgroup analyses including unexplained stillbirths yielded an OR of 1.47 [95% CI 1.20, 1.80], an OR of 2.11 [95% CI 1.16, 3.84] for explained stillbirths and an OR of 1.27 [95% CI 0.95, 1.70] for antepartum stillbirths. Only one study reported adjusted estimates in the miscarriage review, therefore results are presented individually.

CONCLUSIONS

Given the recent revision of the National Institute for Health and Clinical Excellence guidelines (NICE), providing women the right to request a caesarean, it is essential to establish whether mode of delivery has an association with subsequent risk of stillbirth or miscarriage. Overall, compared to vaginal delivery, the pooled estimates suggest that caesarean delivery may increase the risk of stillbirth by 23%. Results for the miscarriage review were inconsistent and lack of adjustment for confounding was a major limitation. Higher methodological quality research is required to reliably assess the risk of miscarriage in subsequent pregnancies.

The experience of labor, maternal perception of the infant, and the mother's postpartum mood in a low-risk community cohort

Postpartum negative mood interferes with maternal-infant bonding and carries long-term negative consequences for infant growth. We examined the effects of birth-related risks on mother's postpartum anxiety and depression. A community cohort of 1,844 low-risk women who delivered a singleton term baby completed measures assessing delivery, emotions during labor, attitudes toward pregnancy and infant, mood regulation, and postpartum anxiety and depression. Under conditions of low risk, 20.5% of parturient women reported high levels of depressive symptoms. Following Cesarean Section Delivery (CSD), 23% reported high depressive symptoms, compared to 19% following Vaginal Delivery (VGD), and 21% after Assisted Vaginal Delivery (AVGD). State anxiety was highest in CSD and lowest in VGD. Mothers undergoing CSD experienced labor as most negative, reported highest somatic symptoms during the last trimester, and were least efficient in regulating negative mood. Postpartum depression was independently associated with higher maternal age, CSD, labor pain, lower negative and higher positive emotions during labor, inefficient mood regulation, somatic symptoms, and more negative and less positive perception of fetus during last trimester. Results demonstrate that elevated depressive symptoms are prevalent in the postpartum even under optimal socioeconomic and health conditions and increase following CSD. Interventions to increase positive infant-related perceptions and emotions may be especially important for promoting bond formation following CSD.

Regional variation in the cesarean delivery and assisted vaginal delivery rates

OBJECTIVE

To examine regional variations in rates of primary cesarean delivery and assisted vaginal delivery in the population of British Columbia, while adjusting for the maternal characteristics and conditions that increase the likelihood of operative delivery.

METHODS

Using data from the British Columbia Perinatal Database Registry, we studied all deliveries in British Columbia between 2004 and 2007, excluding women who had a previous cesarean delivery (n=116,839). Our primary outcome of interest was mode of delivery, further defined as delivery by cesarean or assisted vaginal delivery. We calculated crude and risk-adjusted rates of primary cesarean delivery and assisted vaginal delivery across British Columbia's 16 Health Service Delivery Areas and examined cesarean delivery rates by indication for the procedure.

RESULTS

Crude primary cesarean delivery and assisted vaginal delivery rates varied markedly across the Health Service Delivery Areas ranging from 16.1 to 27.5 per 100 deliveries, and from 8.6 to 18.6 per 100 deliveries, respectively. The most common indication for cesarean delivery was dystocia, which accounted for 30.0% of all cesarean deliveries and varied more than fivefold across regions. After controlling for maternal characteristics and conditions known to increase the likelihood of cesarean delivery and assisted vaginal delivery, adjusted cesarean delivery rates varied twofold, ranging from 14.7 to 27.6 per 100 deliveries, while adjusted assisted vaginal delivery rates varied by more than twofold, ranging from 6.5 to 15.3 per 100 deliveries.

CONCLUSION

Our results illustrate substantial regional variation in the use of cesarean delivery that cannot be explained by patient illness or preferences. This variation likely reflects differences in practitioners' approaches to medical decision-making.

LEVEL OF EVIDENCE

II.

Study protocol. ECSSIT - Elective Caesarean Section Syntocinon Infusion Trial. A multi-centre randomised controlled trial of oxytocin (Syntocinon) 5 IU bolus and placebo infusion versus oxytocin 5 IU bolus and 40 IU infusion for the control of blood loss at elective caesarean section

BACKGROUND

Caesarean section is one of the most commonly performed major operations in women throughout the world. Rates are escalating, with studies from the United States of America, the United Kingdom, China and the Republic of Ireland reporting rates between 20% and 25%. Operative morbidity includes haemorrhage, anaemia, blood transfusion and in severe cases, maternal death. The value of routine oxytocics in the third stage of vaginal birth has been well established and it has been assumed that these benefits apply to caesarean delivery as well. A slow bolus dose of oxytocin is recommended following delivery of the baby at caesarean section. Some clinicians use an additional infusion of oxytocin for a further period following the procedure. Intravenous oxytocin has a very short half-life (4-10 minutes) therefore the potential advantage of an oxytocin infusion is that it maintains uterine contractility throughout the surgical procedure and immediate postpartum period, when most primary haemorrhages occur. The few trials to date addressing the optimal approach to preventing haemorrhage at caesarean section have been under-powered to evaluate clinically important outcomes. There has been no trial to date comparing the use of an intravenous slow bolus of oxytocin versus an oxytocin bolus and infusion.

METHODS AND DESIGN

A multi-centre randomised controlled trial is proposed. The study will take place in five large maternity units in Ireland with collaboration between academics and clinicians in the disciplines of obstetrics and anaesthetics. It will involve 2000 women undergoing elective caesarean section after 36 weeks gestation. The main outcome measure will be major haemorrhage (blood loss >1000 ml). A study involving 2000 women will have 80% power to detect a 36% relative change in the risk of major haemorrhage with two-sided 5% alpha.

DISCUSSION

It is both important and timely that we evaluate the optimal approach to the management of the third stage at elective caesarean section. Safe operative delivery is now a priority and a reality for many pregnant women. Obstetricians, obstetric anaesthetists, midwives and pregnant women need high quality evidence on which to base management approaches. The overall aim is to reduce maternal haemorrhagic morbidity and its attendant risks at elective caesarean section.

TRIAL REGISTRATION

number: ISRCTN17813715.

Associação entre via de parto e complicações maternas em hospital público da Grande São Paulo, Brasil

O estudo objetivou avaliar associação entre via de parto e complicações maternas. Realizou-se coorte retrospectiva com partos ocorridos durante o ano de 2003, em um hospital público. As complicações avaliadas foram: infecção, hemorragia, histerectomia, rotura uterina, lesão de órgão contíguo, trombose venosa profunda e embolia pulmonar. Utilizou-se a odds ratio (OR) e os testes de qui-quadrado de Pearson e de Fisher, além da regressão logística. Estabeleceu-se o nível de 0,05 como significante. Foram encontradas 15 complicações. Tomando-se o parto vaginal como referência, encontrou-se associação entre cesárea e as complicações tomadas em conjunto. Analisando-se variáveis confundidoras, encontrou-se associação das complicações com hipertensão, soropositividade para HIV, placenta prévia e descolamento prematuro de placenta. Após controle para estas quatro variáveis, manteve-se a associação entre cesárea e complicações (OR = 9,7; p = 0,04). Encontrou-se também associação entre complicações e cesárea eletiva comparada ao parto vaginal (OR = 4,7; p = 0,02), e maior proporção de complicações, no limite da significância estatística, nas cesáreas eletivas comparadas à "tentativa de parto vaginal" (OR = 3; p = 0,058). Conclui-se que a cesárea associa-se a complicações maternas, mesmo após a realização de vários ajustes.

Maternal brain response to own baby-cry is affected by cesarean section delivery

A range of early circumstances surrounding the birth of a child affects peripartum hormones, parental behavior and infant wellbeing. One of these factors, which may lead to postpartum depression, is the mode of delivery: vaginal delivery (VD) or cesarean section delivery (CSD). To test the hypothesis that CSD mothers would be less responsive to own baby-cry stimuli than VD mothers in the immediate postpartum period, we conducted functional magnetic resonance imaging, 2-4 weeks after delivery, of the brains of six mothers who delivered vaginally and six who had an elective CSD. VD mothers' brains were significantly more responsive than CSD mothers' brains to their own baby-cry in the superior and middle temporal gyri, superior frontal gyrus, medial fusiform gyrus, superior parietal lobe, as well as regions of the caudate, thalamus, hypothalamus, amygdala and pons. Also, within preferentially active regions of VD brains, there were correlations across all 12 mothers with out-of-magnet variables. These include correlations between own baby-cry responses in the left and right lenticular nuclei and parental preoccupations (r = .64, p < .05 and .67, p < .05 respectively), as well as in the superior frontal cortex and Beck depression inventory (r = .78, p < .01). First this suggests that VD mothers are more sensitive to own baby-cry than CSD mothers in the early postpartum in sensory processing, empathy, arousal, motivation, reward and habit-regulation circuits. Second, independent of mode of delivery, parental worries and mood are related to specific brain activations in response to own baby-cry.

Improved outcomes, fewer cesarean deliveries, and reduced litigation: results of a new paradigm in patient safety

In a health care delivery system with an annual delivery rate of approximately 220,000, a comprehensive redesign of patient safety process was undertaken based on the following principles: (1) uniform processes and procedure result in an improved quality; (2) every member of the obstetric team should be required to halt any process that is deemed to be dangerous; (3) cesarean delivery is best viewed as a process alternative, not an outcome or quality endpoint; (4) malpractice loss is best avoided by reduction in adverse outcomes and the development of unambiguous practice guidelines; and (5) effective peer review is essential to quality medical practice yet may be impossible to achieve at a local level in some departments. Since the inception of this program, we have seen improvements in patient outcomes, a dramatic decline in litigation claims, and a reduction in the primary cesarean delivery rate.

Financial incentives do not always work: an example of cesarean sections in Taiwan

OBJECTIVES

To test the hypothesis that cesarean sections are less likely to be performed after equalizing the fees for vaginal births and cesarean sections.

METHODS

Population-based National Health Insurance inpatient claims in Taiwan are used. Pre-periods and post-periods are identified to investigate the impact of the policy changes. Logistic regressions are employed.

RESULTS

The cesarean section rates for the first, second and higher-order births are 29, 37.4 and 39.3%, while the primary cesarean section rates are 29, 11.8 and 12.1%, respectively. After taking into consideration the case-mix and birth order, the second and higher-order births were approximately 60% less likely to be cesarean deliveries compared to the first births and the increase in the VBAC fee had an additional negative effect on them. A fee equalization policy was not found to influence the cesarean delivery. The total cesarean section rate was primarily determined by the cesarean section rate for the first birth.

CONCLUSIONS

Cesarean section rates are greater for the higher-order births because of the practice "once a cesarean section, always a cesarean section". Against the background of a rapidly declining fertility rate, females play a more important role in the mode of delivery than ever before. As such, financial incentives designed specifically for obstetricians do not have the desired impact. Policies that are aimed at altering behavior should be designed within the social context.

How much influence do women in Sweden have on caesarean section? A follow-up study of women's preferences in early pregnancy

OBJECTIVE

to investigate factors associated with having a caesarean section, with special emphasis on women's preferences in early pregnancy.

DESIGN

a cohort study using data from questionnaires in early pregnancy and 2 months after childbirth, and data from the Swedish Medical Birth Register.

SETTING

women were recruited from 97% of all antenatal clinics in Sweden at their booking visit during 3 weeks between 1999 and 2000, and followed up 2 months after birth.

PARTICIPANTS

a total of 2878 Swedish-speaking women were included in the study (87% of those who consented to participate and 63% of all women eligible for the study).

FINDINGS

Of 236 women who wished to have their babies delivered by caesarean section when asked in early pregnancy, 30.5% subsequently had an elective caesarean section and 14.8% an emergency caesarean section. The logistic regression analyses showed that, a preference for caesarean section in early pregnancy (odds ratio [OR] 9.63, 95% confidence interval [CI] 5.94-15.59), a medical diagnosis (OR 9.03, 95% CI 5.68-14.34), age (OR 1.08, 95% CI 1.03-1.13), parity (OR 0.58, 95% CI 0.37-0.91), a previous elective caesarean section (OR 15.11, 95% CI 6.83-33.41) and a previous emergency caesarean section (OR 18.29, 95% CI 10.00-33.44) was associated with having an elective caesarean section. Having an emergency caesarean section was associated with a preference for a caesarean section (OR 2.59, 95% 1.61 to 4.18), a medical diagnosis (OR 4.12, 95% CI 2.91-5.88), age (OR 1.08, 95% CI 1.05-1.12), primiparity (OR 3.34, 95% CI 1.78-6.27), a previous emergency caesarean section (OR 10.69, 95% CI 6.03-18.94), and a previous elective caesarean section (OR 7.21, 95% CI 2.90-17.92).

KEY CONCLUSIONS AND IMPLICATIONS FOR PRACTICE

a woman's own preference about caesarean section was associated with the subsequent mode of delivery. Asking women about their preference regarding mode of delivery in early pregnancy may increase the opportunity to provide adequate support and possibly also to reduce the caesarean section rate.

Variation in the rates of operative delivery in the United States

OBJECTIVES

This study was undertaken to examine the national and regional rates of operative delivery among almost one quarter million births in a single year in the nation's largest healthcare delivery system, using variation as an arbiter of the quality of decision making.

STUDY DESIGN

We compared the variation in rates of primary cesarean and operative vaginal delivery in facilities of the Hospital Corporation of America during the year 2004.

RESULTS

In 124 facilities representing almost 220,000 births during a 1-year period, the primary cesarean and operative vaginal delivery rates were 19% +/- 5% (range 9-37) and 7% +/- 4% (range 1-23). Within individual geographic regions, we consistently found variations of 200-300% in rates of primary cesarean delivery and variations approximating an order of magnitude for operative vaginal delivery.

CONCLUSION

Within broad upper and lower limits, rates of operative delivery in the United States are highly variable and suggest a pattern of almost random decision making. This reflects a lack of sufficient reliable, outcomes-based data to guide clinical decision making.

Caesarean sections and maternal mortality in Sao Paulo

OBJECTIVES

To evaluate caesarean section in both public and private sectors; maternal mortality associated with mode of delivery in the public sector (Sistema Unico de Saude, SUS) in Sao Paulo State, Brazil.

STUDY DESIGN

610,630 births in both public and private sectors for 2003; 1,153,034 deliveries and 314 maternal deaths in the public sector for 2001-2003. The study estimated caesarean section rates and odds ratios for caesarean section in association with maternal characteristics in both public and private sectors; maternal mortality associated with mode of delivery in the public sector, adjusted for hypertension, other disorders, problems and complications, as well as maternal age.

RESULTS

The caesarean section rate was 32.9% in the public sector, and 80.4% in the private sector. The odd ratio for caesarean section was 2.6 (95% CI: 2.6-2.7) for women with 12 or more years of education. The odd ratio for maternal mortality associated with caesarean section in the public sector was 3.3 (95% CI: 2.6-4.3).

CONCLUSIONS

Sao Paulo presented high caesarean section rates. Caesarean section compared to vaginal delivery in the public sector presented higher risk for mortality even when adjusted for hypertension, other disorders, problems and complications, as well as maternal age.

Psychosocial sequelae of cesarean delivery: review and analysis of their causes and implications

A growing number of children around the world are being born by surgical delivery, or cesarean section. Concerns over rising rates of cesareans have focused on the risk of death and medical complications associated with surgical delivery but have largely neglected psychosocial and behavioral factors that affect and are affected by cesarean delivery. We summarize research which indicates that women who deliver by cesarean section have more negative perceptions of their birth experience, their selves, and their infants, exhibit poorer parenting behaviors, and may be at higher risk for postpartum mood disturbance compared to women delivering infants vaginally. We also review evidence that suggests that cesareans adversely influence women's moods and perceptions by restricting the control that they can exercise over birth and by violating expectations about childbirth. Based on these findings, we recommend ways to reduce the aversiveness of cesareans, offer recommendations for future research, and discuss implications of escalating rates of cesareans, including medically non-indicated cesareans by request.

Cesarean Delivery or Vaginal Birth

OBJECTIVE

To estimate what level of additional fetal risk women and their caregivers in late pregnancy considered acceptable to avoid a cesarean and achieve a vaginal birth.

METHODS

Six hundred women in late pregnancy and 294 obstetric consultants, registrars, midwives, and medical students were recruited to the study. With the assistance of a visual probability aid representing 10,000 births, they were asked to consider what level of fetal risk of death or serious disability they would consider acceptable to avoid cesarean and achieve vaginal birth.

RESULTS

The median level of fetal risk deemed acceptable to achieve a vaginal birth for pregnant women was 10 per 10,000 births (95% confidence interval [CI] 10-13 per 10,000), although the range of responses was wide (1-5,000 per 10,000). Among staff, the median level of acceptable fetal risk was 13 per 10,000 births (95% CI 10-20 per 10,000). Women participating in lower intervention models of care, such as the birth center or team midwifery, were more tolerant of fetal risk (odds ratios [ORs] 2.1, 95% CI 1.6-2.9 and 1.5, 95% CI 1.0-2.3, for accepting a fetal risk of 20 per 10,000 or greater), whereas women with a complicated pregnancy were less tolerant of fetal risk (OR 0.7, 95% CI 0.5-0.9).

CONCLUSION

Pregnant women and their caregivers have a low tolerance for fetal risk associated with vaginal birth. This study demonstrates the difficulty of minimizing obstetric intervention rates in the face of high expectations for fetal outcome. Obstetric and demographic factors were found to significantly impact the "acceptable fetal risk" threshold, which highlights the importance of individualized counseling regarding mode of birth.

LEVEL OF EVIDENCE

III.

Planned cesarean versus planned vaginal delivery at term: comparison of newborn infant outcomes

OBJECTIVE

The purpose of this study was to examine neonatal outcomes among women with a planned cesarean and a planned vaginal delivery at term.

STUDY DESIGN

This prospective survey was conducted on 18,653 singleton deliveries that represent 24 maternity units during a 6-month period. The data were retrieved from the Medical Birth Registry of Norway and analyzed according to intended mode of delivery.

RESULTS

Compared with planned vaginal deliveries, planned cesarean delivery increased transfer rates to the neonatal intensive care unit from 5.2% to 9.8% (P < .001). The risk for pulmonary disorders (transient tachypnea of the newborn infant and respiratory distress syndrome) rose from 0.8% to 1.6% (P = .01). There were no significant differences in the risks for low Apgar score and neurologic symptoms.

CONCLUSION

A planned cesarean delivery doubled both the rate of transfer to the neonatal intensive care unit and the risk for pulmonary disorders, compared with a planned vaginal delivery.

Psychosocial influences on women's experience of planned elective cesarean section

OBJECTIVE

The successful management of pain from normal or interventional delivery is an important part of women's experience of childbirth. Our objective was to examine psychosocial factors (expectations, control beliefs, anxiety sensitivity) as measured in mothers and birth partners before an elective cesarean section. We focused on the impact that these variables have on maternal fear and pain during and after delivery.

METHODS

Sixty-five women booked for an awake cesarean section with a regional nerve block and their birth partners were recruited. Data were collected at three time points for the mothers, before, during the cesarean section and after delivery on the postnatal ward, and at two time points for the birth partners (before and during the cesarean section).

RESULTS

Maternal fear responses varied during the operation, in that fear was greatest at the point of administration of the nerve block. Within mothers, preoperative negative expectations were related to fear experiences during delivery, which was in turn related to their postoperative pain. Maternal anxiety sensitivity was found to mediate the relationship between negative expectations and fear, whereas birth partner's fear mediated between maternal fear and postoperative pain. Mothers' prenatal perceptions of control over drugs predicted their postoperative pain.

CONCLUSIONS

Maternal fear during cesarean section not only fluctuates, but may be influenced by psychosocial factors, including their birth partner. Psychosocial factors were also important predictors of postoperative experiences. Interventions that appropriately manage psychological and social factors during cesarean delivery may facilitate a more positive experience for mothers.

Indications associated with increased cesarean section rates in a Swedish hospital

OBJECTIVE

To analyze the indications and Robson classes associated with the rapid increase in cesarean section (CS) rates at Söder Hospital, Stockholm, Sweden, in the late 1990s.

METHOD

Records of women who underwent CSs in 1994 and 1999 at Söder Hospital were retrospectively reviewed. Diagnostic frequency and Robson class, which takes into account characteristics such as parity, previous deliveries, prematurity, and fetal presentation, were compared for the 2 years.

RESULTS

Suspected fetal distress (+1.6%; P = .0001), maternal request (+1.5%; P < .0001), and labor dystocia (+0.8%; P = .03) were associated with the increase in CS rates. The rate of CSs with cephalic presentation and spontaneous onset of labor at term, as well as the rate of CSs following induced labor or elective CSs, increases significantly in both nulliparas and multiparas (Robson classes 1-4) (P < .02).

CONCLUSION

The increasing CS rate was due to maternal preference and lower thresholds of decision for physicians.

Pelvic floor morbidity at 3 years after instrumental delivery and cesarean delivery in the second stage of labor and the impact of a subsequent delivery

OBJECTIVE

To compare pelvic floor symptoms at three years following instrumental delivery and cesarean section in the second stage of labor and to assess the impact of a subsequent delivery.

STUDY DESIGN

We conducted a prospective cohort study of 393 women with term, singleton, cephalic pregnancies who required instrumental vaginal delivery in theatre or cesarean section at full dilatation between February 1999 and February 2000. 283 women (72%) returned postal questionnaires at three years.

RESULTS

Urinary incontinence at three years post delivery was greater in the instrumental delivery group as compared to the cesarean section group (10.5% vs 2.0%), OR 5.37 (95% CI, 1.7, 27.9). There were no significant differences in ano-rectal or sexual symptoms between the two groups. Pelvic floor symptoms were similar for women delivered by cesarean section after a failed trial of instrumental delivery compared to immediate cesarean section. A subsequent delivery did not increase the risk of pelvic floor symptoms at three years in either group.

CONCLUSION

An increased risk of urinary incontinence persists up to three years following instrumental vaginal delivery compared to cesarean section in the second stage of labor. However, pelvic floor symptoms are not exacerbated by a subsequent delivery.

Term neonatal asphyxial seizures and peripartum deaths: lack of correlation with a rising cesarean delivery rate

OBJECTIVE

The purpose of this analysis was to study the relationship between an increasing cesarean delivery rate and term neonatal seizures and peripartum deaths.

STUDY DESIGN

This was a retrospective analysis of annually collated institutional data on cesarean delivery and perinatal outcome.

RESULTS

Of 77,350 women who delivered at 37 weeks' gestation or more through 12 years (1989 to 2000), the cesarean rate increased from 6.9% to 15.1%; perinatal mortality at term, average 3.1/1000, was unchanged. The cesarean rate for nulliparas doubled from 8.3% to 17.5%. The overall neonatal term seizure rate (overall 1.3/1000; and for nulliparas 2.5/1000) did not change. The overall peripartum death rate (0.8/1000) was unchanged, although the rate for nulliparas (1.5/1000) showed a significant decline. Overall seizure rate in nulliparas was 5-fold higher than in multiparas; presumed intrapartum asphyxia was associated with 84% of both seizures and neonatal deaths in nulliparas. Among 2547 prelabor cesarean deliveries, there were no peripartum deaths and one neonatal seizure, an incidence comparable with that in multiparas who labored.

CONCLUSION

Despite a greater than 2-fold rise in cesarean section rate, the seizure rate and overall peripartum death rate at term did not alter significantly. Neonatal seizures occurred 5 times more often following first deliveries.

Throwing out the baby with the spa water?

Australia is now one of the safest countries in the world in which to be born. This is largely a result of the many advances in obstetric and neonatal medicine of the past 50 years. However, the "medicalisation" of birth has tended to diminish women's satisfaction with their experience of childbirth. It has been shown that women are most satisfied by care from a single practitioner, and when they themselves have input into decision-making. Although maternal satisfaction is important, it should not be promoted at the expense of the health of mothers and babies. More realistic antenatal education and preparation should be available for all pregnant women so that both maternal satisfaction and good perinatal outcomes can be achieved.

L’élévation du taux de césariennes : un progrès nécessaire de l’obstétrique moderne

During the last 10 Years, the cesarean section (CS) rate was increased despite of the recommendations of the World Health Organization to keep it below 10-15%. The purpose of this review of the literature was to demonstrate how the concept of CS rate limitation has become obsolete. The increase in the CS rate is mainly justified by the decrease in maternal mortality and morbidity following elective CS: surgery-related risks have decreased and the confusion that was made between the risks of vaginal delivery and those of trial of labor has to be clarified to show that maternal mortality and morbidity are not increased by elective CS. However, instrumental delivery and CS during labor remain two situations at high risks both for the mother and her fetus. There is also an association between the increase in the CS rate and the decrease in perinatal mortality and morbidity, but this effect would only become clinically significant after a dramatic increase in the CS rate: this is the preventile principle of "marginal death". Numerous articles have been published reporting on the effects of vaginal delivery for the pelvic floor: urinary incontinence, pelvic organ prolapse, and especially fecal incontinence. All these publications concluded that CS has a protective effect. The rising duty to provide information to patients in high risk obstetrical situations such as a history of CS also contributes to the overall increase in CS rate mainly through the elective CS rate. Indeed, when faced with the alternative choices of potentially severe complications either for themselves or their child, women are likely to choose what appears to be the safest mode of delivery for their child and thus to opt for a CS. Finally, widespread delivery of information to the patients about trial of labor itself and the risks of vaginal delivery is the first step towards a "principle of preference", which consists in giving an important place to the patient's choice in the decision-making process, and thus to recognize her right to ask for an elective CS.