Gonadotrophins include FSH and LH. Which of the following functions is not of LH ?

Options

A. It induces ovulation of fully mature follicles.
B. It maintains the corpus luteum
C. It stimulates the interstitial cells of Leydig
D. It stimulates growth of the ovarian follicles.

Answer

To solve the question regarding the functions of LH (Luteinizing Hormone) and to identify which function is not associated with LH, we can break down the options provided:

1. **Understanding Gonadotropins**: Gonadotropins are hormones that stimulate the gonads (ovaries in females and testes in males). The two main gonadotropins are FSH (Follicle Stimulating Hormone) and LH.

2. **Analyzing Each Option**:
- **Option A: It induces ovulation of fully mature follicles.**
- LH is known to trigger ovulation. During the menstrual cycle, a surge in LH levels leads to the release of the secondary oocyte from the Graafian follicle. This statement is true for LH.

- **Option B: It maintains the corpus luteum.**
- After ovulation, the remnants of the Graafian follicle transform into the corpus luteum, which produces progesterone to maintain the uterine lining. LH is essential for the maintenance of the corpus luteum. This statement is also true for LH.

- **Option C: It stimulates the interstitial cells or Leydig cells.**
- In males, LH stimulates Leydig cells in the testes to produce testosterone, which is responsible for the development of male secondary sexual characteristics. This statement is true for LH.

- **Option D: It stimulates growth of ovarian follicles.**
- The growth and maturation of ovarian follicles are primarily stimulated by FSH, not LH. Therefore, this statement is not a function of LH.

3. **Conclusion**: Based on the analysis, the function that is not associated with LH is:
- **D. It stimulates growth of ovarian follicles.**

### Final Answer:
**D. It stimulates growth of ovarian follicles.**