ovarium gyratum

例句：

1. 1. The embryonic development of the human fetus is closely linked to the ovarian cycle.
   人类胎儿的胚胎发育与卵巢周期密切相关。
2. 2. During pregnancy, the yolk sac provides nourishment for the developing fetus.
   怀孕期间，卵黄囊为发育中的胎儿提供营养。
3. 3.The blastocyst sac is a protective structure that surrounds the fertilized egg.
   囊胚囊是包围受精卵的保护结构。