discogastrula

例句：

1. 1. The uterus is the organ that contains the developing fetus.
   子宫是容纳正在发育中的胎儿的器官。
2. 2. The discogastrula is a small, round structure that forms in the uterus duringpregnancy.
   在怀孕期间，子宫内形成了一个小型的圆形结构，称为胎囊。
3. 3.During labor, the discogastrula breaks down and releases the baby's head.
   分娩过程中，胎囊破裂并释放出婴儿的头部。