noun
expulsion stage of labour; expulsive stage
Medical term for the second stage of labour, from full cervical dilation to delivery of the baby.
娩出期は、子宮口が全開してから赤ちゃんが生まれるまでの段階です。
The expulsion stage is the phase from full cervical dilation until the baby is born.
開口期 is the first stage of labour (cervical dilation), preceding 娩出期.
後産期 is the third stage of labour (delivery of the placenta), following 娩出期.
Compound of 娩出 (expulsion, delivery) + 期 (stage, period). The exact historical derivation is uncertain; the spelling is conventionally associated with medical terminology.