Which of the following hormones helps to attain sexual maturity?

Options

A. GnRH
B. somatostatin
C. serotonin
D. Follicle stimulating hormone

Answer

To answer the question "Which of the following hormones helps to attain sexual maturity?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Sexual Maturity**:
- Sexual maturity, also known as puberty, is the stage when an individual becomes capable of reproduction. This occurs at different ages for males and females, typically around 12-13 years for males and 11-12 years for females.

2. **Identifying Key Hormones**:
- The transition from the growth phase to the reproductive phase is regulated by specific hormones. The primary hormone responsible for initiating this transition is the Gonadotropin-Releasing Hormone (GnRH).

3. **Role of GnRH**:
- GnRH is produced in the hypothalamus and released into the bloodstream. It acts on the anterior pituitary gland, stimulating it to release two important hormones: Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH).

4. **Effects of FSH and LH**:
- In females, FSH and LH stimulate the ovaries to produce estrogen and progesterone, which are crucial for the development of secondary sexual characteristics and menstrual cycle regulation.
- In males, FSH and LH stimulate the testes to produce testosterone, the primary androgen responsible for spermatogenesis and the development of male secondary sexual characteristics.

5. **Conclusion**:
- Among the hormones mentioned, the Gonadotropin-Releasing Hormone (GnRH) is the key hormone that helps attain sexual maturity. Other hormones like somatostatin, serotonin, and FSH do not play the primary role in this transition.

### Final Answer:
The hormone that helps to attain sexual maturity is **Gonadotropin-Releasing Hormone (GnRH)**.

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