If you take emergency contraceptive pills and then have sex, and did not do a good job of contraception may still be pregnant. Because the emergency contraceptive pill is only for the previous sex has a certain remedial effect, and the success rate of remedial is about 85%, not 100%, on the back of the sex does not have a regular contraceptive effect. If you are worried about unwanted pregnancy, you can consider the copper ionized ring, this ring has the role of emergency contraception, to go to the regular hospital as soon as possible within 72 hours after the incident on the ring. In addition, you can also take oral mifepristone tablets 25mg a piece, take 50mg at once, when taking oral fasting for two hours. Subsequent sexual life must strictly use condoms throughout the good contraceptive measures, more than 12 days after intercourse can be used to test the pregnancy stick or to the hospital blood test HCG to rule out pregnancy.