Withdrawal bleeding is bleeding that occurs when the endometrium lining of the uterus loses its hormonal support to shedding after taking estrogen and progesterone medications due to the change in hormone levels after stopping taking them. The causes of withdrawal bleeding include the use of medications to regulate menstruation and taking birth control pills.
In order to regulate menstruation, patients take progesterone capsules under the guidance of a doctor for three or five days, and menstruation occurs within three to seven days after stopping, a phenomenon called withdrawal bleeding.
Oral emergency contraceptive pills, a single dose within 72 hours after sexual intercourse, usually produces withdrawal bleeding within three days to ten days after taking.
Oral short-acting contraceptives, which generally need to be taken for 21 or 22 days, will produce withdrawal bleeding within three to seven days after stopping. It is also possible to produce withdrawal bleeding if you miss a dose in between. This is a method of regulating menstruation and a method of contraception, among other things.
Whether you use estrogen or progestin to regulate menstruation or as a contraceptive, it is important that you use the medication under a doctor’s supervision, and that you do not use the medication on your own.