Regular vacation means menstruation. Menstruation may come early, delayed or normal after taking emergency contraceptive pills. The most common side effect of oral emergency contraceptive pills is menstrual disruption, which may be delayed and also early menstruation. If there is irregular vaginal bleeding after taking the pill, sometimes it is transient, sometimes it is incessant, and there may be a delay in menstruation, then it is advisable to check if you are pregnant. If irregular vaginal bleeding occurs, it is recommended to consult a doctor to find out the cause of the bleeding. Effective contraception, such as condoms and birth control rings, is recommended to avoid unwanted pregnancy. Oral emergency contraceptive pills can cause endocrine disorders and menstrual disorders, not necessarily delayed menstruation, but also early menstruation.