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。

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某些色（）颈卵器顶部的一组细胞，例如轮属和伞属的冠细胞。

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。