Breakthrough bleeding after taking birth control pills

Jul 17, 2024 Source: Cainiu Health
Disease description:

Because I don't want to get pregnant, I took birth control pills. Doctor, how many days after taking the contraceptive pill will I experience bleeding?

Doctor's answer (1)
Dr. Zhang Lu

Bleeding may occur within a few days or weeks after starting birth control pills.

It is especially common during the initial period of starting the contraceptive pills, known as "breakthrough bleeding." This type of bleeding usually occurs when the body is adjusting to hormonal changes. The bleeding is typically light and short-lived. As time progresses and the body adjusts to the medication, the bleeding usually decreases or stops altogether.

Different types of birth control pills may have varying effects. For example, oral contraceptives are divided into monophasic, biphasic, and triphasic pills, each differing in hormone content and cycle schedule, which can lead to variations in bleeding patterns. Long-acting contraceptive injections or intrauterine devices may also cause irregular bleeding.

If the bleeding is heavy, prolonged, or suddenly appears after taking the contraceptive pills for some time, you should consult a doctor.