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

Options

A. FSH only
B. LH only
C. Combination of FSH and LH
D. Combination of estrogens and progesterone

Answer

### Step-by-Step Solution:

1. **Understanding Menstruation**:
- Menstruation is the periodic discharge of blood, tissue, and mucus from the reproductive organs of a sexually mature female. It typically lasts from 3 to 6 days.

2. **Role of Hormones**:
- The two main hormones involved in regulating the menstrual cycle are estrogen and progesterone.
- Estrogen levels peak twice during the menstrual cycle: once during the follicular phase and again during the luteal phase.
- Progesterone is low before ovulation and increases after ovulation during the luteal phase.

3. **Hormonal Changes During Menstruation**:
- If pregnancy does not occur, the levels of estrogen and progesterone drop, leading to menstruation.
- If pregnancy occurs, the levels of these hormones are maintained to support the pregnancy.

4. **Deferring Menstruation**:
- To defer menstruation, one can administer hormones that maintain the levels of estrogen and progesterone.
- This is typically achieved through the use of hormonal contraceptives, which often contain synthetic forms of these hormones.

5. **Conclusion**:
- The administration of hormones, particularly estrogen and progesterone, can defer menstruation. Therefore, the correct answer to the question is the administration of these hormones.