1. In the first phase, the oogonium has little cytoplasm and bigger nuclear-cytoplasmic ratio.
   第1时相，卵原细胞细胞质较少，核质比较大。
2. The proliferative phase of the oogonium was found in the gestational age between 41d and 84d.
   卵原细胞增殖期为41-84天胎龄间，而增殖高峰在41-48天间出现。
3. A group of cells at the tip of the oogonium in certain green algae (Chlorophyta), such as the stonewort Chara and the mermaid's cup (Acetabularia).
   2某些绿色藻类（绿藻门）中颈卵器顶部的一组细胞，例如轮藻属和伞藻属的冠细胞。

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