3-4% of term deliveries. (Most common fetal malpresentation)
In normal delivery, head dilates cervix and allows body to pass relatively easily.
In<unk> , body does not first maximally dilate cervix → higher risk of head entrapment, cord prolapse, and death.<unk>  presentations occur most commonly in preterm infants (25-30% of preterm deliveries <28 wks gestation).
In<unk> , body does not first maximally dilate cervix → higher risk of head entrapment, cord prolapse, and death.
Breech delivery
Emergent delivery
Shoulder dystocia
Umbilical cord prolapse
Preterm labor
Intrauterine fetal demise
Perimortem cesarean delivery
Vasa previa