Selecting appropriate candidates for vaginal breech birth remains a major clinical challenge, particularly in nulliparous women where maternal pelvic factors are underrepresented in current guidelines. In this large prospective cohort study of 876 term breech pregnancies, prenatal magnetic resonance imaging–based pelvimetry was used to evaluate the role of intertuberous distance in predicting delivery outcomes and neonatal morbidity.
A smaller intertuberous distance was independently associated with higher cesarean section rates, increased need for assisted head delivery during vaginal breech birth, and greater short-term neonatal morbidity after adjustment for key fetal and pelvic variables. Importantly, an intertuberous distance below 11 cm identified a subgroup at increased risk, suggesting that prenatal pelvimetry may offer clinically meaningful support in selecting candidates for…
