Select the incorrect statement

Options

A. FSH stimulates the sertoli cells which help in sperminogenesis
B. LH triggers ovulation in ovary
C. LH and FSH decrease gradually during the follicular phase
D. LH trigger secretion of androgens from the Leydig cells

Answer

To solve the question of selecting the incorrect statement regarding hormones involved in reproduction, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- The statement claims that Follicle Stimulating Hormone (FSH) stimulates Sertoli cells, which help in spermatogenesis.
- **Evaluation:** This statement is correct. FSH indeed stimulates Sertoli cells, which are crucial for the process of spermatogenesis (the formation of sperm).

2. **Analyze the Second Statement:**
- The statement claims that Luteinizing Hormone (LH) triggers ovulation in the ovaries.
- **Evaluation:** This statement is also correct. LH is well-known for triggering ovulation, which is the release of an egg from the ovary.

3. **Analyze the Third Statement:**
- The statement claims that LH and FSH both decrease gradually during the follicular phase.
- **Evaluation:** This statement is incorrect. During the follicular phase, the levels of LH and FSH actually increase to stimulate follicular growth and estrogen production. Therefore, this statement is false.

4. **Analyze the Fourth Statement:**
- The statement claims that LH triggers the secretion of androgens from the Leydig cells.
- **Evaluation:** This statement is correct. LH stimulates Leydig cells in males to secrete testosterone, which is an androgen.

### Conclusion:
The incorrect statement is the third one: "LH and FSH both decrease gradually during the follicular phase." This is false because both hormones actually increase during this phase.