Taking emergency contraceptive pills after menstruation may delay menstruation or cause it to start earlier.
Emergency contraceptive pills are high-dose progestins, and after taking them, withdrawal bleeding is usually possible within 3 to 10 days. If you take it just after your period has cleared, during the first half of your period, it may lead to early menstruation. If you take it within 10 days before your period, it may cause your period to be delayed.
Not everyone who takes the emergency contraceptive pill will have withdrawal bleeding. Some women take the pill without affecting their menstrual cycle and come to their period normally.
No contraceptive method is 100% accurate, so once your period is delayed for more than 7 days, you need to go to the hospital to rule out the possibility of unwanted pregnancy. The emergency contraceptive pill after menstruation needs to be taken by a doctor according to the specific time of taking, diagnosis of menstruation early or wrong, to avoid unwanted pregnancy.