Which one of the following statements is incorrect about menstruation?

Options

A. During normal menstruation about 40 ml blood is lost
B. The menstrual fluid can easily clot
C. At menopause in the female, there is especially abrupt increase in gonadotropic hormones
D. The beginning of the cycle of menstruation is called menarche

Explanation

To determine which statement is incorrect about menstruation, let's analyze each option step by step:

1. **Statement Analysis**:
- **Statement 1**: "During normal menstruation, about 40 ml of blood is lost."
- This statement is true. During a normal menstrual cycle, the average blood loss is indeed around 30 to 80 ml, so 40 ml falls within this range.

- **Statement 2**: "The menstrual fluid can easily clot."
- This statement is incorrect. Menstrual fluid does not clot easily due to the presence of anticoagulants in the menstrual blood, which prevent clotting.

- **Statement 3**: "At menopause in females, there is especially abrupt increase in gonadotrophin hormones."
- This statement is true. During menopause, there is a significant increase in gonadotropin hormones (such as FSH and LH) due to the decreased levels of estrogen and progesterone.

- **Statement 4**: "The beginning of the cycle of menstruation is called menarche."
- This statement is true. Menarche refers to the first occurrence of menstruation, marking the beginning of a female's reproductive cycle.

2. **Conclusion**:
- The only incorrect statement about menstruation is: "The menstrual fluid can easily clot."