Which stage of follicle shows secondary oocyte stage inside the follicle?

Options

A. Primordial follicle
B. Primary follicle
C. Secondary follicle
D. Graafian follicle

Answer

To determine which stage of the follicle contains the secondary oocyte, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Stages of Follicle Development**:
- The development of ovarian follicles progresses through several stages: primordial follicle, primary follicle, secondary follicle, tertiary (or Graafian) follicle.

2. **Identify the Oocyte Stages**:
- The oocyte develops from a primary oocyte to a secondary oocyte. The primary oocyte is diploid (2n) and undergoes meiosis to become a secondary oocyte, which is haploid (n).

3. **Locate the Secondary Oocyte**:
- The secondary oocyte is formed during the transition from the primary follicle to the secondary follicle and is ultimately found in the Graafian follicle (mature follicle).

4. **Confirm the Follicle Stage with Secondary Oocyte**:
- In the Graafian follicle, the secondary oocyte is present, and it is released during ovulation. This is the stage where the secondary oocyte is fully developed and ready for fertilization.

5. **Conclusion**:
- Therefore, the stage of the follicle that shows the secondary oocyte is the **Graafian follicle**.

### Final Answer:
The stage of the follicle that shows the secondary oocyte is the **Graafian follicle**.

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