Intensity lactating mothers do not generally conceive due to the

Options

A. suppression of gonadotropins
B. hypersecretion of gonadotropins
C. suppression of gametic transport
D. suppression of fertilisation

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks why intensely lactating mothers do not generally conceive. The options provided suggest various hormonal and physiological factors that might influence conception.

2. **Identifying Key Hormones**: During intense lactation, the hormone prolactin is produced in high amounts. Prolactin is responsible for milk production and has significant effects on the reproductive system.

3. **Effects of Prolactin**: High levels of prolactin lead to the suppression of gonadotropins. Gonadotropins include Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH), which are crucial for the regulation of the menstrual cycle and ovulation.

4. **Consequences of Gonadotropin Suppression**: When gonadotropins are suppressed, the following occurs:
- **No Follicle Development**: FSH is responsible for the growth of ovarian follicles. Without FSH, follicles do not mature.
- **No Ovulation**: LH triggers ovulation. If LH is suppressed, ovulation does not occur.

5. **Conclusion**: Since ovulation is a prerequisite for fertilization, the suppression of gonadotropins due to high prolactin levels means that there will be no ovulation and, consequently, no possibility of conception.

6. **Final Answer**: Therefore, the correct answer to the question is **suppression of gonadotropins** (Option A).