How does the fertilization affect the menstrual cycle?

Answer 1

Fertilization would be when conception occurs, if the fertilized egg implants itself in the uterus lining this is when pregnancy occurs and thus the menstrual cycles stop. Although fertilization doesn't always result in pregnancy, and pregnancy can miscarry at any point.

Answer 2

Fertilization occurs when a sperm penetrates an egg, resulting in the formation of a zygote. If fertilization occurs, the zygote implants into the uterus and produces hormones that prevent the shedding of the uterine lining, thus stopping the menstrual cycle. If fertilization does not occur, the uterine lining sheds during menstruation.