Question

when an ovum get fertilized the menstrual cycle stops temporally in a woman give the scientific reason for the statement

Answer 1

In females the menstrual cycle is a self-regulating process during which the body undergoes many physiological and hormonal changes. The menstrual cycle is regulated by two hormones secreted from the pituitary gland, follicle stimulating hormone (FSH) and luteinizing hormone (LH). These control the production of the hormones estrogen and progesterone, which are produced in the ovaries.Females begin their menstrual cycle during puberty at the onset of menarche, their first menstrual period. Females continue to have many menstrual cycles throughout their lives untilmenopauseoccurs between ages 40 to 60

Answer 2

The ovary produced ova.Along with the production of egg ,the inner part of the uterus develops a thick layer called endometrium made of special tissues.This is for providing a proper surface for the attachment of embryo.If fertilization takes place ,the endometrium is retained.This is why the menstrual cycle stops temporally.
Actually endometrial tissues with blood discharge during menstruation.As endometrial layer is essential, mensutration temporally stops.