Term breech presentation vaginal births in Tibet: A retrospective analysis of 451 cases.

Background: In high altitude areas, like Tibet, most fetuses in breech presentation at term are delivered vaginally owing to a variety of reasons, but this has not been published. Objective: This study aimed to provide references and evidence for the delivery of breach presentation term fetuses in high altitude areas, through comparing and analyzing the data of full-term singleton fetuses with breech or cephalic presentation in Naqu People's Hospital, Tibet. Study design: We retrospectively analyzed the clinical data of 451 breech presentation fetuses mentioned above over a period of 5 years (2016-2020). A total of 526 cephalic presentation fetuses' data within 3 months (1 June to 1 September 2020) of the same period were collected too. Statistics were compared and assembled on fetal mortality, Apgar scores, and severe neonatal complications for both planned cesarean section (CS) and vaginal delivery. In addition, we also analyzed the types of breech presentation, the second stage of labor, and damage to the maternal perineum during vaginal delivery. Results: Among the 451 cases of breech presentation fetuses, 22 cases (4.9%) elected for CS and 429 cases (95.1%) elected for vaginal delivery. Of the women who chose vaginal trial labor, 17 cases underwent emergency CSs. The perinatal and neonatal mortality rate was 4.2% in the planned vaginal delivery group and the incidence of severe neonatal complications was 11.7% in the transvaginal group, no deaths were detected in the CS group. Among the 526 cephalic control groups with planned vaginal delivery, the perinatal and neonatal mortality was 1.5% (p = 0.012), and the incidence of severe neonatal complications was 1.9%. Among vaginal breech deliveries, most of them were complete breech presentation (61.17%). Among the 364 cases, the proportion of intact perinea was 45.1%, and first degree lacerations accounted for 40.7%. Conclusion: In the Tibetan Plateau region, vaginal delivery was less safe than cephalic presentation fetuses for full-term breech presentation fetuses delivered in the lithotomy position. However, if dystocia or fetal distress can be identified in time and then encouraged to convert to cesarean, its safety will be greatly improved.

Introducing the fragility index-A case study using the Term Breech Trial.

The fragility index (FI) is a sensitivity analysis of the statistically significant result of a clinical study. It is the number of hypothetical changes in the primary event of one of the two cohorts in a 1-to-1 comparative trial to render the statistically significant result non-significant (ie, to alter the P-value from ≤0.05 to >0.05). The FI can be compared with the patient drop-out rates and protocol violations, which, if much higher than the FI, may arguably suggest less robustness/stability of the trial's results. To illustrate the concept, we have chosen the Term Breech Trial (TBT) as a case study. The TBT results favor planned cesarean birth, as opposed to planned vaginal delivery, in the term singleton fetus with breech presentation. Our analysis shows that the FI of the TBT is 21, which is small in comparison to the number (hundreds) of protocol violations present. Some experts have suggested the inclusion of the FI in data analysis and subsequent discussion of clinical trial data. Routine use of such a metric may be valuable in encouraging readers to maintain a healthy degree of skepticism, especially when interpreting trial results which may directly influence clinical practice.

The (After)life of a Trial: Biocommunicability of an At-Risk Pregnancy.

The publication of A Randomized Trial of Induction Versus Expectant Management (ARRIVE), conducted in the United States in 2018, heralded a paradigm shift within the obstetrical management of term pregnancy among people who have not previously given birth. ARRIVE finds its home among other canonical - and controversial - randomized controlled trials (RCTs) within obstetrics. We argue that RCTs have their own (after)life, both creating new subjects for biomedical intervention and recalibrating who reproductive health practitioners consider to be at risk of adverse health outcomes. These data have important consequences for medical social scientific engagement with RCTs to further interrogate the questions of risk and intervention within reproductive health.

Conceptual and ethical problems underpinning calls to abandon vaginal breech birth.

The view that vaginal breech birth is unjustifiable due to neonatal safety concerns has resulted in continued calls for breech pregnancies to be managed via a policy of planned caesarean birth. Vaginal breech birth has of course always occurred, but women with term breech pregnancies who seek to have a vaginal birth often face coercive pressures to have a caesarean birth instead. In this paper I argue that even if there is population level evidence that vaginal birth is relatively riskier for the breech presenting fetus, implementing a policy of planned caesarean birth would essentially be an unjustified attempt at forced medical intervention upon women. Advocates of a policy of planned caesarean birth often conflate the acceptability of allocating participants to a treatment group (policy) within the context of a randomized controlled trial with the justifiability of doing that as part of individual health care. Calls for obstetricians to "abandon vaginal breech birth" mistakenly position vaginal breech birth itself as a form of medical intervention that can simply be removed as an option for women by obstetricians. In reality, abandoning vaginal breech birth would entail abandoning women by denying them access to healthcare options that are otherwise available to any woman having a vaginal birth.

Revisiting the management of term breech presentation: a proposal for overcoming some of the controversies.

BACKGROUND: The debate surrounding the management of term breech presentation has excessively focused on the mode of delivery. Indeed, a steady decline in the rate of vaginal breech delivery has been observed over the last three decades, and the soundness of the vaginal route was seriously challenged at the beginning of the 2000s. However, associations between adverse perinatal outcomes and antenatal risk factors have been observed in foetuses that remain in the breech presentation in late gestation, confirming older data and raising the question of the role of these antenatal risk factors in adverse perinatal outcomes. Thus, aspects beyond the mode of delivery must be considered regarding the awareness and adequate management of such situations in term breech pregnancies. MAIN BODY: In the context of the most recent meta-analysis and with the publication of large-scale epidemiologic studies from medical birth registries in countries that have not abruptly altered their criteria for individual decision-making regarding the breech delivery mode, the currently available data provide essential clues to understanding the underlying maternal-foetal conditions beyond the delivery mode that play a role in perinatal outcomes, such as foetal growth restriction and gestational diabetes mellitus. In view of such data, an accurate evaluation of these underlying conditions is necessary in cases of persistent term breech presentation. Timely breech detection, estimated foetal weight/growth curves and foetal/maternal well-being should be considered along with these possible antenatal risk factors; a thorough analysis of foetal presentation and an evaluation of the possible benefit of external cephalic version and pelvic adequacy in each specific situation of persistent breech presentation should be performed. CONCLUSION: The adequate management of term breech pregnancies requires screening and the efficient identification of breech presentation at 36 weeks of gestation, followed by thorough evaluations of foetal weight, growth and mobility, while obstetric history, antenatal gestational disorders and pelvis size/conformation are considered. The management plan, including external cephalic version and follow-up based on the maternal/foetal condition and potentially associated disorders, should be organized on a case-by-case basis by a skilled team after the woman is informed and helped to make a reasoned decision regarding delivery route.

Birth outcomes of singleton term breech deliveries in Jimma University Medical Center, Southwest Ethiopia.

OBJECTIVE: Breech delivery is generally associated with higher perinatal morbidity and mortality than cephalic presentation. Hence describing the outcomes of singleton term breech deliveries in Jimma University Medical Center (JUMC), Southwest Ethiopia addresses in recommendation of improving perinatal outcomes and developing protocols in selecting eligible women. RESULTS: The incidence of singleton term breech delivery was 5.3%. Majority, (52.8%) of them had undergone emergency cesarean delivery (C/D), and 38.9% had vaginal breech delivery. There were 14 (13.9%) intrapartum fetal deaths of whom 5.6% were recorded at JUMC. A quarter (25%) of the neonates required admission to the neonatal intensive care unit; 40.7% had perinatal asphyxia, and there were 3 early onset neonatal deaths making up a perinatal mortality rate of 157.4 per 1000 breech births. The incidence of breech delivery was relatively high. Vaginal breech delivery was lower. Significant proportions of adverse perinatal outcomes were recorded. Introduction of a protocol for managing breech deliveries to select eligible women for trial of breech delivery and strengthen training of junior health professionals regularly on how to conduct assisted vaginal breech delivery to improve perinatal outcome is recommended. Further studies to identify determinants of perinatal outcomes is recommended.

Vaginal delivery or cesarean section at term breech delivery--chance or risk?

AIM: The aim of the study was to examine maternal age, parity, and estimated neonatal birth weight (BW) depending on the mode of a full-term breech presentation (BP) birth delivery and neonatal outcomes. MATERIAL AND METHODS: One hundred and forty-six singleton term breech presentation pregnancies were included in a retrospective study conducted at the Department of Gynecology/Obstetrics, Clinical Center of Serbia in Belgrade in 2013. Statistical analysis: Student's-t test, χ(2) likelihood ratio, and the Fisher's exact test. The level of statistical significance was set at p <0.05. RESULTS: An ECS was the most common mode of delivery in (81.2%) nulliparous older than 35 years and most of the neonates (66.67%) with an estimated birth weight (BW) above 3500 grams were delivered by elective cesarean section (ECS). Perinatal asphyxia remained increased in the successful vaginal delivery (SVD) group (23.8%) compared with the urgent CS (UCS) group (13.3%) (p = 0.035). Birth asphyxia was the most common in neonates were delivered by SVD (23.8%). There were no cases of perinatal deaths. CONCLUSION: ECS remained the recommended mode of breech term delivery in nulliparous women older than 35 years, as well as in neonates with an estimated BW above 3500 grams.

The risks of planned vaginal breech delivery versus planned caesarean section for term breech birth: a meta-analysis including observational studies.

BACKGROUND: The mode of delivery in term singleton breech presentation has been debated for more than half a century and has been examined in both randomised and observational studies. OBJECTIVE: To determine the absolute and relative risks of perinatal mortality and morbidity in planned vaginal breech delivery. SEARCH STRATEGY: A computer-based literature search was conducted mainly in the databases of HINARI, PubMed and Google scholar for studies comparing planned vaginal delivery and planned caesarean section. SELECTION CRITERIA: Studies that assessed the perinatal mortality and morbidity in relation to the term singleton breech mode of delivery between 1993 and 2014 were included. DATA COLLECTION AND ANALYSIS: In this meta-analysis, 27 articles with a total sample size of 258 953 women were included. Relative and absolute risks of perinatal mortality and morbidity in relation to mode of delivery were determined. MAIN RESULTS: The relative risk of perinatal mortality and morbidity was about two- to five-fold higher in the planned vaginal than in the planned caesarean delivery group. The absolute risks of perinatal mortality, fetal neurologic morbidity, birth trauma, 5-minute Apgar score <7 and neonatal asphyxia in the planned vaginal delivery group were 0.3, 0.7, 0.7, 2.4 and 3.3%, respectively. CONCLUSION: Perinatal mortality and morbidity in the planned vaginal breech delivery were significantly higher than with planned caesarean delivery. Even taking into account the relatively low absolute risks of vaginal breech delivery, the current study substantiates the practice of individualised decision-making on the route of delivery in a term breech presentation. TWEETABLE ABSTRACT: Although vaginal breech delivery is controversial, this review has shown low absolute risk.

Vaginal breech birth: can we move beyond the Term Breech Trial?

Since the publication of the Term Breech Trial in 2000, planned cesarean has become the preferred mode of birth for women whose fetus is in a breech presentation. Over the past 20 years, however, subsequent evidence has not shown conclusively that cesarean birth is safer than vaginal birth for a fetus in a breech presentation when certain criteria are met. Many obstetric organizations support the option of planned vaginal birth for women with a breech presentation under strict prelabor selection criteria and intrapartum management guidelines. The growing trend toward cesarean unfortunately has left midwives and other intrapartum care providers in training with dwindling opportunities to competently master skills for vaginal breech birth. Although simulation training offers opportunities to practice infrequently encountered skills such as vaginal breech birth, it is unknown if this alternative will provide sufficient experience for future generations of clinicians. As a result, women with a breech presentation at term who desire a trial of labor often have limited choices. This article reviews the controversies surrounding the ideal mode of birth created by the Term Breech Trial. Criteria for vaginal breech birth are summarized and the role of simulation explored. Implications for midwifery practice when a breech presentation is diagnosed are also included.