Ovulation is stimulated by

Options

A. LH
B. FSH
C. Estrogen
D. Progesterone.

Answer

**Step-by-Step Solution:**

1. **Understanding Ovulation**: Ovulation is the process where an egg is released from the ovarian follicle. This is a crucial part of the female reproductive cycle.

2. **Identifying Key Hormones**: The hormones involved in the regulation of ovulation include Luteinizing Hormone (LH), Follicle Stimulating Hormone (FSH), estrogen, and progesterone.

3. **Role of LH and FSH**: Both LH and FSH play significant roles in the maturation of the ovarian follicle. FSH is primarily responsible for stimulating the growth of the ovarian follicles, while LH is crucial for triggering ovulation.

4. **The LH Surge**: When the follicle matures, there is a surge in LH levels, known as the LH surge. This surge is what directly stimulates the release of the egg from the follicle.

5. **Evaluating Other Hormones**:
- **FSH**: While it is involved in follicle maturation, it does not directly stimulate ovulation.
- **Estrogen**: Although it is produced by the ovarian follicle and plays a role in the menstrual cycle, it is not the hormone that triggers ovulation.
- **Progesterone**: This hormone is primarily involved in maintaining the uterine lining and is not responsible for stimulating ovulation.

6. **Conclusion**: Based on the roles of these hormones, the hormone that primarily stimulates ovulation is Luteinizing Hormone (LH).

**Final Answer**: Ovulation is stimulated by LH (Luteinizing Hormone).

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