有的母亲分娩时选择硬膜外麻醉。Some mothers choose to have an epidural when giving birth.母亲们了解分娩时的痛苦.Mothers know the travail of giving birth to a child.当妇女分娩时, 子宫颈张开让婴儿生出来.When a woman is in labour, her cervix opens up to allow the bab...