Group 2 (control group): will include 45 patients to whom 100 mg of CC will be administrated daily for five days starting on day 2 of the cycle induced by MPA, for one menstrual cycle, then a wash out period for another menstrual cycle, then the group treatment plan is shifted to administration of 100 mg of CC daily for five days starting the next day after finishing MPA (medroxyprogesterone acetate) 10 mg tablet for five days for another menstrual cycle.