Bleeding after Stopping Birth Control
Birth control pills contain hormones that affect some of the normal processes of the female reproductive system such as ovulation and the menstrual cycle. The hormones disrupt the menstrual cycle, thus suppressing menstruation. For this reason, taking oral contraceptives lessens heavy menstrual bleeding, prevents cramps and migraines associated with menstruation, and allows a woman to prevent menstruation for convenience.
However, bleeding after stopping birth control may occur as a result of these factors:
Taking inactive pills
Traditionally, birth control pills come in a 28-day pack, with 21 active hormone pills and 7 inactive pills. During the course of seven days when taking the inactive pills, withdrawal bleeding occurs. Withdrawal bleeding is the result of the sudden change in hormones after the amount of hormone received for 21 days. This occurrence is normal, and bleeding stops once a new pack is started.
Missing a pill
This type of bleeding is called breakthrough bleeding, and it occurs while on active pills. The hormones in each active pill cause the endometrium to build up its consistency, preventing it from shedding. However, if a pill is missed or taken at a different time each day, the lining loses the quality that it has as caused by the daily supply of hormones. This causes a sloughing of the endometrium, and bits of it appear as blood spots, or breakthrough bleeding.