Immediately after the development of antrum the follicle becomes

Options

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

Answer

To solve the question "Immediately after the development of antrum the follicle becomes," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Follicles**:
- Follicles in the ovary develop through several stages: primordial follicle, primary follicle, secondary follicle, and tertiary follicle (also known as Graafian follicle).

2. **Identify the Role of Antrum**:
- The antrum is a fluid-filled cavity that forms within the follicle. Its development signifies a key transition in follicle maturation.

3. **Sequence of Follicle Development**:
- Initially, primordial germ cells develop into primordial follicles.
- These primordial follicles then mature into primary follicles.
- Following this, primary follicles develop into secondary follicles.
- The antrum begins to form in the secondary follicle.

4. **Tertiary Follicle Formation**:
- The formation of the antrum is a characteristic feature of the secondary follicle transitioning into the tertiary follicle.
- Therefore, immediately after the development of the antrum, the follicle is classified as a tertiary follicle.

5. **Conclusion**:
- Based on the above understanding, the correct answer to the question is that immediately after the development of the antrum, the follicle becomes a tertiary follicle.

### Final Answer:
The follicle becomes a tertiary follicle immediately after the development of the antrum.

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