noun
labor room; labour room
A room in a maternity ward where a woman in labor stays before being moved to the delivery room.
陣痛室で家族が付き添うことができます。
Family members can stay with the mother in the labor room.
分娩室 is the delivery room where the actual birth takes place, while 陣痛室 is the labor room where the mother waits during contractions before delivery.
Compound of 陣痛 (labor pains) and 室 (room).