noun
breech presentation; breech birth
Medical and everyday term for a fetus positioned feet or buttocks first in the birth canal.
検診で赤ちゃんが逆子だとわかった。
The checkup showed the baby is in a breech position.
逆子の場合、帝王切開になることがある。
In the case of a breech presentation, a cesarean section may be performed.
Compound of 逆 (saka, 'reverse') and 子 (ko, 'child'), with rendaku voicing of 子 to ご. The reading さかご is a straightforward combination of these elements.