Female contraceptive fluid is a liquid that is pumped into the vagina and waits for five minutes before intercourse, the fluid kills sperm and acts as a contraceptive. Female contraceptive fluid, when introduced into the woman’s vagina, has a bactericidal and spermicidal effect and also acts as a barrier against sexually transmitted infections (STIs). Five minutes before intercourse, the woman raises her hips, opens the cap of the injection tube and injects the liquid into the vagina, after which she can have intercourse. It is important to use the contraceptive liquid according to the instructions; mishandling it can increase the contraceptive failure rate. Contraceptive liquid is alkaline, into the vagina is easy to destroy the normal vaginal acidic environment, leading to a decline in the vaginal defense function, easy to cause flora imbalance, should not be used for a long time.