有时胎盘会在分娩后被保留。

Sometimes the placenta is retained after delivery.

绒毛膜是胎盘的重要组成部分。

The chorion is an essential part of the placenta.

脐带将婴儿与胎盘连接起来。

The umbilical cord connects the baby to the placenta.

婴儿出生后，胎盘会从体内排出。

The placenta is expelled from the body after the baby is born.

胎盘在怀孕期间为胎儿提供营养。

The placenta provides nutrients to the fetus during pregnancy.

胎盘在怀孕期间附着在子宫壁上。

The placenta attaches to the wall of the uterus during pregnancy.

医生检查了胎盘以确保一切正常。

The doctor examined the placenta to ensure everything was normal.

胎盘早剥可能导致胎儿缺氧。

Placental abruption can lead to fetal oxygen deprivation.

胎盘早剥的症状包括腹痛和出血。

Symptoms of placental abruption include abdominal pain and bleeding.

滋养层细胞在妊娠期间帮助形成胎盘。

Trophoblasts help form the placenta during pregnancy.