Oogenesis is the formation of a mature female gamete or ovum. Meiosis I occurs in the primary oocyte and gets arrested at the prophase I (diplotene stage) for years. It is completed in developing tertiary follicles giving rise to the secondary oocyte and first polar body. Meiosis II starts immediately after the secondary oocyte is formed but stops at the metaphase stage. Meiosis II completes only at the time of fertilisation giving rise to the ovum or ootid and the second polar body.
- Why Is A Single Ovum Produced By Oogenesis?
- Do Oogenesis And Spermatogenesis Both Continue Throughout The Human Lifespan?
- Which Hormone Triggers Spermatogenesis?
- During Oogenesis Why Does The Oocyte Arrest Its Cell Division At Various Places, Why Can’t It Form An Ovum Straight Away?
- How Many Polar Bodies Are Formed During Oogenesis In Humans?
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