Expand FSH.

Explanation

**Step-by-Step Solution:**

1. **Identify the Abbreviation**: The question asks for the expansion of the abbreviation "FSH."

2. **Recall the Full Form**: The full form of FSH is "Follicle Stimulating Hormone."

3. **Understand Its Function**: FSH is a gonadotropin hormone that plays a crucial role in the reproductive system. It is secreted by the anterior pituitary gland.

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