There are more types of birth control pills, and as long as they are taken correctly under the guidance of a doctor, the contraceptive rate is still relatively high, generally above 95%. Commonly used contraceptive pills include short-acting contraceptive pills, long-acting contraceptive pills and visiting contraceptive pills. Different contraceptive pills are taken in different ways. The commonly used short-acting pill should be taken on the second day of the menstrual cycle, once a day, one pill each time, for 22 days, then stop taking it for 7 days and start the next cycle. Emergency contraceptive pills, taken within 72 hours after intercourse, are more effective the earlier they are taken. Long-acting contraceptive pills are taken twice in the first month and once every month thereafter. When taking contraceptive pills, it is best to avoid missing doses and to fix the same time to take them.