In the human female , menstruation can be deferred by the administration of :-

Options

A. combination of FSH and LH
B. combination of estrogen and progesterone
C. FSH only
D. LH only

Answer

To answer the question, "In the human female, menstruation can be deferred by the administration of:", we need to analyze the hormonal regulation of the menstrual cycle and identify which hormone can delay menstruation.

### Step-by-Step Solution:

1. **Understand the Menstrual Cycle**:
- The menstrual cycle typically lasts about 28 to 30 days. It involves the release of an ovum (egg) from the ovary and the preparation of the endometrium (uterine lining) for potential implantation of a fertilized egg.

2. **Role of Hormones**:
- The menstrual cycle is regulated by several hormones, primarily released by the anterior pituitary gland and the ovaries.
- Key hormones include:
- **FSH (Follicle Stimulating Hormone)**: Stimulates the growth of ovarian follicles.
- **LH (Luteinizing Hormone)**: Triggers ovulation and the formation of the corpus luteum.
- **Estrogen**: Involved in the growth of the endometrium.
- **Progesterone**: Maintains the endometrium and is crucial for pregnancy.

3. **Menstruation Process**:
- If fertilization does not occur, the corpus luteum degenerates, leading to a drop in progesterone levels, which causes the shedding of the endometrium, resulting in menstruation.

4. **Hormonal Influence on Menstruation**:
- To delay menstruation, we need to maintain elevated levels of progesterone. This is because progesterone helps to maintain the endometrial lining and prevents its shedding.

5. **Evaluate Options**:
- **Option A**: Combination of FSH and LH - Incorrect, as these hormones promote ovulation and do not delay menstruation.
- **Option B**: Combination of Estrogen and Progesterone - Correct, as progesterone specifically helps to maintain the endometrial lining and can delay menstruation.
- **Option C**: FSH - Incorrect, as it does not have a role in delaying menstruation.
- **Option D**: LH - Incorrect, as it triggers ovulation which leads to menstruation if fertilization does not occur.

6. **Conclusion**:
- The correct answer is **Option B: Combination of Estrogen and Progesterone**. The administration of these hormones, particularly progesterone, can effectively delay menstruation.