Question

what is Menarche and Menopause??

Answer 1

Menarche is referred as the starting stage of the menstrual cycle in a puberty aged female...

Menopause is referred as the ending stage of the menstrual cycle in a woman.
It ends in the age of 50-60 years...
It is not same for all the females...
High variation can take place.
hope that helps you!
cheers! (:

Answer 2

Menarche is the first menstrual cycle or first menstrual bleeding, in female humans  

Menopause is the natural decline in reproductive hormones when a woman reaches her 50s or 60s