cephalopelvic disproportion; CPD
Medical term for when the fetal head is too large or the maternal pelvis too small for a safe vaginal delivery.
Because cephalopelvic disproportion was diagnosed, a cesarean section was scheduled.
Compound of 児頭 (fetal head), 骨盤 (pelvis), and 不均衡 (imbalance/disproportion). The exact historical derivation is uncertain; the term is a modern medical coinage.