Question

Which of the following statements are correct regarding female reproductive cycle?

1. In non-primate mammals cyclical changes during reproduction are called oestrus cycle.
2. First menstrual cycle begins at puberty and is called menopause.
3. Lack of menstruation may be indicative of pregnancy.
4. Cyclic menstruation extends between menarche and menopause.

Choose the most appropriate answer from the options given below:

पर्याय

• A and B only

• A, B and C only

• A, C and D only

• A and D only

Answer 1

A, C and D only

Explanation:

• Statement A is correct: The oestrus cycle refers to the cyclical variations in reproduction in non-primate animals.
• Statement B is incorrect: Menarche refers to the first menstrual period that occurs during puberty.
• Statement C is correct: Lack of menstruation is caused by hormonal changes that promote foetal growth and development. As a result, it may indicate pregnancy.
• Statement D is correct: Cyclic menstruation occurs between menarche and menopause, where the uterine lining thickens to prepare for pregnancy and sheds if not fertilised. The cycle repeats.