delivery; parturition
Medical term for the process of giving birth; used in clinical or veterinary contexts.
Please contact the hospital as soon as labor begins.
出産 is the common word for childbirth, while 分娩作用 is a technical medical term for the physiological process of delivery.
Compound of 分娩 (delivery, childbirth) and 作用 (action, effect), forming a technical term for the process of parturition.