Short-term birth control pills are taken every day. The regular way to take it is 21+7. The 21+7 method is to take 1 tablet per day for 21 days and the pill is stopped for 7 days before starting the next round of oral contraceptives. The oral contraceptive pill contains estrogen and requires that it be taken at the same time of day, i.e., at the right time, with one pill taken 24 hours. The first dose is taken on the 1st day of your period, or you can take it on the 2nd-5th day of your period. But it should be noted that the first oral short-acting contraceptive pill, in the first cycle, the first 7 days, not today to take the first time, you can contraception, in the first 7 days, if there is sex, to take other contraceptive tools. After 7 days of taking the pill, you can only have sex without using other contraceptives.