Eggs librated from ovary in human in

Options

A. Secondary oocyte stage
B. Primary oocyte stage
C. Oogonial stage
D. Mature ovum stage

Answer

**Step-by-Step Solution:**

1. **Understanding Oogenesis**: The process of egg (ovum) formation in humans is known as oogenesis. It begins with the primordial germ cells that develop into oogonia.

2. **Oogonia Stage**: Oogonia are diploid (2N) cells that undergo mitosis to increase their numbers. This stage occurs before birth.

3. **Primary Oocyte Formation**: Some oogonia develop into primary oocytes, which are also diploid (2N). This transition occurs during fetal development and is completed before birth.

4. **Meiosis Initiation**: At birth, the primary oocytes enter prophase I of meiosis and remain arrested in this stage until puberty.

5. **Secondary Oocyte Liberation**: Upon reaching puberty, during each menstrual cycle, a primary oocyte completes the first meiotic division to form a secondary oocyte (haploid, N) and a polar body. The secondary oocyte is the one that is liberated from the ovary during ovulation.

6. **Fertilization or Menstruation**: If fertilization occurs, the secondary oocyte will complete the second meiotic division. If not fertilized, the secondary oocyte will be shed during menstruation.

7. **Conclusion**: The egg is liberated from the ovary in the form of a secondary oocyte during ovulation.

**Final Answer**: The eggs are liberated from the ovary in the secondary oocyte stage.

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