Question

Explain why there is no mention cycle before puberty after menopause and during pregnancy

Answer 1

Answer:

menstruation only occur when an unfertilized ovum gets insert in the uterus

before puberty girls haven't developed the

ability or are unable to produce ova so there is no creation of uterus

after menopause they lose the ability to produce more eggs

and during pregnancy a fertilized ovum already had embedded to uterus so the formation of ova stop for a period of 9 months