At which stage of the development, ovum is released from the ovary of human female?

Options

A. Primary oocyte
B. Oogonium
C. Secondary oocyte
D. Ootid

Answer

To determine at which stage of development the ovum is released from the ovary of a human female, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Oogenesis**:
- Oogenesis is the process of female gamete (egg) formation in humans. It begins during embryonic development.

2. **Identify the Precursor Cells**:
- The precursor cells for oogenesis are called oogonia. These are the initial cells that will develop into ova.

3. **Formation of Primary Oocytes**:
- Oogonia undergo mitotic divisions to form primary oocytes. This occurs before birth.

4. **Meiosis of Primary Oocytes**:
- Primary oocytes enter meiosis but are arrested in prophase I until puberty. Upon reaching puberty, they resume meiosis during the menstrual cycle.

5. **Development of Secondary Oocytes**:
- During the menstrual cycle, primary oocytes complete meiosis I to form secondary oocytes. This is the stage just before ovulation.

6. **Release of the Ovum**:
- The ovum is released from the ovary during the secondary oocyte stage. This is the correct answer to the question.

7. **Completion of Oogenesis**:
- If fertilization occurs, the secondary oocyte will complete meiosis II and become an ootid, but the release itself happens at the secondary oocyte stage.

### Final Answer:
The ovum is released from the ovary of a human female at the **secondary oocyte** stage.

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