amniotic band

例句：

1. 1. The amniotic band is a thin membrane that surrounds the fetus during pregnancy.
   羊膜带是怀孕时围绕胎儿的薄膜。
2. 2. The amniotic band helps toprotect the fetus from harmful substancesin the mother's body.
   羊膜带有助于保护胎儿免受母体有害物质的伤害。
3. 3. During labor, the amnioticband can be ruptured, causingpremature birth or stillbirth.
   分娩过程中，羊膜带可能会破裂，导致早产或死产。