amniotic fold

例句：

1. 1. The amniotic folds are responsible for thebaby's protection during pregnancy.
   羊膜囊褶皱负责在怀孕期间保护胎儿。
2. 2.During labor, the amniotic folds expand to create a space for thebaby to pass through.
   在分娩过程中，羊膜囊褶皱会扩张以创造一个空间让宝宝通过。
3. 3. The amniotic folds can be used asan indicator of fetal distress inutero.
   羊膜囊褶皱可以作为胎儿宫内窘迫的一个指标。