The overall success rate of emergency contraceptive pills is around 80% to 90%, and there is still some possibility of pregnancy after taking the pills.
Emergency contraceptives mainly include estrogen-progestin combination preparations, single progestin preparations, and anti-progestin preparations. It is mainly through the oral administration of a large number of hormones to inhibit the fertilization of the egg, its side effects and contraceptive efficiency is lower than conventional contraception. However, the pregnancy rate of progestin preparation is only 4% after reasonable medication, and the effective rate of anti-progestin preparation can be more than 85%.
In addition, the success rate of contraceptive pills at different times of the menstrual cycle is not the same, for example, before and after ovulation, the highest chance of pregnancy. The success rate of emergency contraceptive pills is relatively low; if you have intercourse 2-3 days before menstruation, the success rate of emergency contraceptive pills is relatively high.
Although the overall contraceptive success rate of emergency contraceptive pills can reach 80% to 90%, but after taking the drug should also pay attention to, if there is a delay in menstruation and other suspected pregnancy, it is recommended to consult a doctor as soon as possible to standardize the diagnosis and treatment of the medication to be in accordance with the doctor’s instructions.