Is it normal for menstruation to start more than ten days earlier after taking contraceptive pills?

Aug 24, 2022 Source: Cainiu Health
Disease description:

Last time I had intercourse during my ovulation period, so I took emergency contraceptive pills. I noticed that my period came earlier this month. Is it normal for the menstrual cycle to come more than ten days earlier after taking contraceptive pills?

Doctor's answer (1)
Dr. Lv Aiming
It is also considered normal for menstruation to come more than ten days earlier after taking contraceptive pills, as women often experience irregular vaginal bleeding following emergency contraception. Since contraceptive pills are estrogen-based medications, they can have certain effects on the body. Therefore, their use should be minimized, and safer contraceptive methods should be adopted in daily life.