Regardless of the brand of emergency contraceptive pill, its main ingredient is a large amount of progestin, the contraceptive effect is not very different. The more clinically used emergency contraceptive pill is Yutin, usually within seventy-two hours of sex without contraceptive measures or contraceptive failure, the earlier it is taken, the higher the success rate of contraception. But yutin side effects such as endocrine disorders, withdrawal bleeding after taking the pill, menstrual disorders, etc., so can not be used as a regular contraceptive measures, the number of times a year can not exceed three times, a month at most take a. And try to choose the appropriate contraceptive measures, such as the placement of intrauterine device or the use of condoms. Pay attention to vulva hygiene, wear loose cotton underwear, and eat more vegetables and fruits.