The generic name of Jin Yuting is levonorgestrel and the generic name of Yosmin is drospirenone cyproterone, which taken together may lead to symptoms such as abnormal vaginal bleeding and menstrual disorders. Levonorgestrel is used after unprotected sex to provide emergency contraception. Generally speaking, it is recommended to take it within 72 hours after unprotected intercourse, and the earlier it is taken, the better the contraceptive effect. Drospirenone cyproterone is a short-acting contraceptive, generally need to be taken in accordance with the regularity, not only can play a contraceptive effect, but also can play a role in regulating menstruation. Generally with drospirenone cyproterone after 7 days, can play a contraceptive effect, at this time even if the coitus without other contraceptive measures, is also possible, do not need to take oral levonorgestrel. If it is within 7 days, other contraceptive measures may be needed, and if oral levonorgestrel is taken, it may lead to abnormal vaginal bleeding and menstrual disorders. In general, it is recommended that condoms can be used for contraception. Mixing birth control pills may affect hormone levels and cause abnormal vaginal bleeding and menstrual disorders.