Scientific contraception: what are the methods of contraception? How do I choose?

There are many contraceptive methods, such as safe period contraception, extracorporeal ejaculation contraception, lactation contraception, emergency contraceptives, condoms, compound short-acting oral contraceptives, intrauterine devices, subcutaneous implants, etc., but some of these contraceptive methods are very effective and some are not so effective. Among them, the failure rate of safe period contraception, in vitro ejaculation contraception and lactation contraception is very high and is not recommended. Emergency contraceptives, because of their high failure rate and severe endocrine effects on women, are not recommended as routine contraceptive methods. Condoms, when used correctly, have high contraceptive rates and can block the spread of sexually transmitted diseases. Combined short-acting oral contraceptives, intrauterine devices, subcutaneous implants are called high-efficiency contraceptive methods because of their reliable contraceptive effects. The contraceptive effect of the latest generation of compound short-acting oral contraceptives can reach more than 99%. Containing drospirenone components diuretic effect, can alleviate the symptoms of premenstrual water sodium retention. Not only will it not gain weight, but it can also effectively control weight. Although the combined short-acting oral contraceptive pill is reliable and has many benefits, there is a risk of unintended pregnancy if it is missed. (Source: Peking University First Hospital)

Source: Beijing 12320 listening