vitellogenesis

例句：

1. 1.The process of ovulation is crucialfor female reproduction.
   排卵过程对于女性生殖至关重要。
2. 2. During the ovulation phase,the egg is released from the ovary.
   在排卵阶段，卵子从卵巢释放出来。
3. 3. Vitellogenesis is a complexprocess that occurs during the maturationof an oocyte.
   卵黄生成是一个复杂的过程，发生在一个卵子成熟的过程中。