Which one of the following statement is incorrect about menstruation ?

Options

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

Answer

To determine which statement is incorrect about menstruation, we will analyze each statement provided in the question.

### Step-by-Step Solution:

1. **Understanding Menstruation**:
- Menstruation is the process where the endometrium (the lining of the uterus) sheds if there is no fertilization of an egg. This typically occurs in a cycle of about 28 to 30 days.

2. **Analyzing the Statements**:
- **Statement A**: "The beginning of the cycle of menstruation is called Menarche."
- This statement is correct. Menarche refers to the first occurrence of menstruation, marking the onset of a female's reproductive capability.

- **Statement B**: "During normal menstruation about 40 ml of blood is lost."
- This statement is incorrect. The average blood loss during menstruation is about 35 ml, not 40 ml. Hence, this is the incorrect statement we are looking for.

- **Statement C**: "The menstrual fluid can easily clot."
- This statement is correct. Menstrual fluid contains components that allow it to clot, which is a normal physiological response.

- **Statement D**: "At menopause in the female, there is a special abrupt increase in gonadotropin hormone."
- This statement is also correct. During menopause, estrogen levels decrease, leading to an increase in gonadotropin hormones (LH and FSH).

3. **Conclusion**:
- After analyzing all the statements, we find that Statement B is the incorrect statement regarding menstruation.

### Final Answer:
**The incorrect statement about menstruation is: "During normal menstruation about 40 ml of blood is lost."**

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