Contraceptive methods include: condoms, short-acting oral contraceptive pills (which are taken every day), birth control rings, in vitro ejaculation, safe period contraception, subcutaneous implantation, male and female ligation, etc. Safety-period contraception: Although convenient, it is unreliable and prone to contraceptive failure, and there is a saying that the safety period is unsafe, so it should not be a regular contraceptive method. Condom contraception: check whether the condom is broken before use, put it on at the beginning of sex, and withdraw it intact after ejaculation to avoid semen leakage, leading to contraceptive failure. Oral contraceptive pill: insist on taking it every day, leakage may lead to bleeding and menstrual disorder, etc. If you don’t miss it, the contraceptive effect is reliable. IUD: Suitable for women who do not want to have children in the short term, it is highly effective contraception with low failure rate. In vitro ejaculation: It is not good for men’s health, the contraceptive effect is unreliable and is not recommended. Ligation: It is a permanent loss of fertility, basically irreversible contraceptive measure, and is rarely used by urban women. Subcutaneous implantation: A small amount of contraceptive pill is buried under the skin of the left upper arm and the drug is released slowly to achieve contraception. The contraceptive effect is reliable. However, there is a possibility of spotting and bleeding and menstrual disorders.