After taking emergency contraceptive drugs, there should be retreating bleeding in about 7 days, which is an adverse reaction to the drug and will cause a small amount of bleeding from the rupture of the endothelium, which will end in 3-7 days and will not last too long. Very few women take more than 7 days, so this is the time to stop the bleeding and then take oral anti-inflammatory drugs to avoid affecting the health of the body. Some women may not bleed after taking oral contraceptives, this is also normal, patiently wait for menstruation, such as oral short-acting contraceptives, short-acting contraceptives need to be taken every day, on time and in the right amount, after the end of the oral need to stop, 2-3 days will come to menstruation, so this time as far as possible to relax, patiently wait for menstruation, at most not more than 10 days, there will be normal menstruation It will not take more than 10 days at most to have a normal period.