In human females menstruation can be deferred by adminstration of

Options

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

Answer

### Step-by-Step Solution:

1. **Understanding Menstruation**: Menstruation is the shedding of the endometrial lining of the uterus, which occurs when the levels of certain hormones drop.

2. **Key Hormones Involved**: The primary hormones involved in regulating the menstrual cycle are estrogen and progesterone. These hormones are crucial for maintaining the endometrial lining.

3. **Role of Progesterone**: Progesterone is particularly important for preparing the endometrium for potential implantation of a fertilized egg. It helps maintain the lining and prevents its shedding.

4. **Hormonal Administration**: To defer menstruation, one can administer hormones that maintain the levels of estrogen and progesterone in the body. This prevents the drop in hormone levels that triggers menstruation.

5. **Options Analysis**:
- **FSH (Follicle Stimulating Hormone)**: Primarily involved in the development of ovarian follicles, not directly in menstruation.
- **LH (Luteinizing Hormone)**: Plays a role in ovulation but does not prevent menstruation.
- **Combination of FSH and LH**: While both are important for reproductive processes, they do not directly defer menstruation.
- **Combination of Estrogen and Progesterone**: This combination is effective in maintaining the endometrial lining and deferring menstruation.

6. **Conclusion**: The correct answer is the administration of a combination of estrogen and progesterone to defer menstruation in human females.

### Final Answer:
In human females, menstruation can be deferred by the administration of a combination of estrogen and progesterone.

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