Since the transverse diameter is greater than the antero-posterior (AP) diameter in the pelvic inlet, the widest circumference of the fetal head descends in a transverse position. Pelvic inlet Borders of the pelvic outlet To understand the mechanism of labour, you need some basic understanding of pelvic anatomy. You might also be interested in our premium collection of 1,000+ ready-made OSCE Stations, including a range of O&G stations ✨ Pelvic anatomy
