Physiology of Female Reproductive System

Physiology of Female Reproductive System - Physiology of...

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Physiology of Female Reproductive System - Oogenesis : ovum formation by meiosis in follicles of ovaries - Oogonia primordial follicles (~ 2 million by birth) o primary oocytes begin meiosis I, but arrest in prophase I - starting at puberty, one follicle is chosen each month (from ~ 400,000 remaining) to complete meiosis I , resulting in a secondary oocyte small polar body - the secondary oocyte begins meiosis II, but arrests in metaphase II (awaiting fertilization in oviduct to complete meiosis II); the polar body may divide to form 2 smaller polar bodies - the secondary oocyte is ovulated & is picked up by uterine tube; if fertilization occurs, following sperm entry meiosis II is completed, forming the ovum and another polar body Kevin Kelleher, MTC Biology 211 Study Notes Exam 4 11 -
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Physiology of Female Reproductive System - Physiology of...

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