A human female experiences two major changes menrache and menopause during her life. Mention the significance of both the events.

Explanation

In human beings, initialion of menstruatoin at puberty (between age 9-15 years) is called menarche. While, menstrual cycles ceases around 50 years of age, that is termed as menopause. Menacrhe signifies the maturation and readiness of the female reproductive system for child bearing.
It marks the capability of the ovaries to produce mature oocyte (female gamete) that can now be fertilised by the sperm and also that the uterus is capable of supporiting the foetal growth and development.
Menopause singnifies the end of child bearing age. At this age supply of healthy eggs is very low, the levels of the hormones secreted by the ovaries decline and the menstruation stops. The uterus no longer remains conductive for foetal growth.