Pregnancy does not usually occur after taking the pill, which has a contraceptive rate of about 98%. And the earlier you take it, the better the effect will be, but there may also be unexpected reactions, there are about 2% of the population will have a contraceptive failure, so there is also the possibility of pregnancy. Contraceptive pill is a relatively safe method of contraception, but often take the pill may lead to the emergence of endocrine disorders, infertility and other phenomena. And there will also be side effects reactions, such as nausea, regurgitation, withdrawal bleeding and other phenomena. It must be noted that it is best not to take contraceptives regularly, so as not to have an impact on their own bodies, taking drugs during pregnancy may lead to fetal malformation, if you are ready to get pregnant must pay attention to stopping the drug for six months before getting pregnant.