How long will my period be delayed after taking birth control pills?

Aug 24, 2022 Source: Cainiu Health
Disease description:

I had unprotected sex and took emergency contraception because I don't want to get pregnant. How long can the pill delay my period?

Doctor's answer (1)
Dr. Lv Aiming
Taking contraceptive pills generally does not cause menstrual delay. However, taking emergency contraceptive pills may lead to delayed menstruation or prolonged menstrual cycles. Since contraceptive pills are hormonal medications, they should not be taken more than three times a year. Excessive use can cause serious harm to the body. It is recommended to choose safe and effective contraceptive methods.