human reproduction: gametogenesis

Question

Primary oocyte is arrested at which meiotic stage until puberty?

RankGuru · Accepted Answer

1. **Oogenesis**: The process of female gamete formation begins during the embryonic development stage.
2. **Initiation**: Millions of oogonia are formed in each fetal ovary; no more are added after birth.
3. **Early Arrest**: These cells start division and enter **Prophase-I** of the meiotic division and get temporarily arrested at that stage. Specifically, the arrest occurs at the **Diplotene** stage (also called the dictyate stage).
4. **Puberty**: This primary oocyte remains arrested within the primary follicle until puberty, after which hormonal cycles cause it to complete the first meiotic division just before ovulation.

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human reproduction: gametogenesis

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