Due to the different types of oral contraceptives, the delay time may be different, short-acting contraceptives will have menstruation within 3~7 days after stopping; emergency contraceptives may delay menstruation for about 1 month after producing withdrawal bleeding. 1. Short-acting contraceptive pills: usually taken for 21 days, menstruation will come within 3~7 days after stopping; if no menstruation occurs for more than 7 days after stopping the pill, you need to go to the hospital to check whether you are pregnant. 2. Emergency contraceptive pills: generally 3~10 days after taking the pills, there will be withdrawal bleeding, with withdrawal bleeding, as long as the menstrual period in about 1 month is normal. If there is no retractive bleeding, the time of coming to menstruation, the wrong time is not more than 7 days, more than 7 days should be ruled out pregnancy. If you have uncomfortable symptoms after taking oral contraceptives, you should consult a doctor for standardized treatment to avoid delay.