chorionic membrane

例句：

1. 1. The chorionic membrane is a thin layer that covers the fetus during pregnancy.
   绒毛膜膜是一层覆盖胎儿的薄层，在怀孕期间。
2. 2.The chorionic membrane plays a crucial role in the development of the fetus.
   绒毛膜膜在胎儿发育中起着至关重要的作用。
3. 3.During labor, the chorionic membrane is shed and the placenta grows larger to support the baby's growth.
   分娩期间，绒毛膜膜脱落，胎盘变大以支持婴儿的生长。