逆ぎゃく産ざんMeanings1nounbreech birth; baby born feet or buttocks firstMedical and everyday term for a delivery where the baby presents feet or buttocks first.逆ぎゃく産ざんの場ば合あい、帝てい王おう切せっ開かいが行おこなわれることが多おおい。In the case of a breech birth, a cesarean section is often performed.