Contraceptive pill is divided into long-acting contraceptive pill, short-acting contraceptive pill and emergency contraceptive pill. For emergency contraceptive pills, taking them one day in advance is not effective and cannot achieve the purpose of contraception, because emergency contraceptive pills are effective within 72 hours after intercourse, and the earlier you take them, the better the effect of contraception, so one day in advance cannot achieve the purpose of contraception. For short-acting contraceptive pills, taking them one day in advance will also not achieve the purpose of contraception, because short-acting contraceptive pills are useful only when taken for at least 7 days in a row. For emergency contraceptive pills, it is not recommended that patients often take them orally, as they can cause menstrual disorders, and it is recommended that condoms can be used to achieve the purpose of contraception.