In addition to condoms, there are many other forms of contraception to avoid pregnancy, as follows: first, the use of intrauterine device, there are many types of birth control ring, metal ring, mother of love ring, Gini ring, etc. The mechanism of the birth control ring, mainly to interfere with the fertilization of the egg, the effect is more reliable. Generally after the removal of the ring, can immediately restore the reproductive function; second, the use of contraceptive pills, contraceptive pills have long-acting contraceptive pills, short-acting contraceptive pills, and after the emergency contraceptive pills and so on. In general, it is recommended to use short-acting contraceptive pills, which are more reliable if taken in a standard way. Emergency contraceptive pill is only an emergency measure after sex, it is not recommended to use, generally not recommended more than two times a year; third, can also be buried under the skin, the skin buried method is now less used, but the contraceptive effect is more reliable.