Menstrual bleeding is the result of
Low levels of ovarian hormones
high level of ovarian hormones
High levels of LH
High levels of FSH
Low levels of ovarian hormones including progesterone and oestrogen cause menstrual bleeding. These hormones are in charge of keeping the endometrium healthy. Low levels of ovarian hormones cause the endometrium to shed, which leads to menstruation—the period of time when bleeding takes place. Thus, the appropriate choice is (a).