A month ago ate contraceptive how did not come menstruation to do all the time

Women take contraceptives a month ago, has not been menstruation, consider more is the estrogen in the contraceptive caused by menstrual stimulation or contraceptive failure, it is recommended to go to the hospital in time for abdominal B ultrasound examination. If the cause of menstrual disorders, adjust the usual living habits, can promote menstruation back to normal.