In the first phase, the oogonium has little cytoplasm and bigger nuclear-cytoplasmic ratio.

第1时相，卵原较少，核比较大。

The proliferative phase of the oogonium was found in the gestational age between 41d and 84d.

卵原增殖期41-84天胎龄间，而增殖高峰在41-48天间出现。

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色藻类（藻门）中颈卵器顶部的一组，例如轮藻属和伞藻属的冠。