Question

Given below are groups of terms. In each group the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.

Beginning of menstruation: Menarche : Ending of menstruation: ___.

Answer 1

Menstrual cycle:

1. Menstruation is a series of cyclic changes that occurs in fertile females during which the inner layer(endometrium) of the uterus along with blood and mucus is removed in the form of vaginal bleeding. It is also known as the menstrual cycle or periods. It occurs usually in an interval of 28days.
2. Menarche is the first menstruation that occurs in the life of a human female during puberty at the age of 11-13 years. It is the beginning of the reproductive cycle.
3. Menopause is the end of menstruation in the life of a human female that occurs at the age of 45-50years.

Final answer:
Beginning of menstruation: Menarche: Ending of menstruation: Menopause.