1、Crossbirth, also known as postmortem delivery, refers to the situation where a fetus is born after the mother has already died.

译文：Crossbirth，也被称为死后分娩，指的是母亲死后胎儿出生的情况。

2、The medical team successfully performed a crossbirth procedure, saving the baby's life after the mother passed away.

译文：医疗团队成功进行了死后分娩手术，在母亲过世后救下了婴儿的生命。