You can have intercourse a few days before your period. The main contraindications to intercourse are: 1) women should not have intercourse during menstruation; 2) women should not have intercourse during the first and last 3 months of pregnancy; 3) women should not have intercourse within 1 month after miscarriage or uterine operation; 4) women should not have intercourse within half a month after intrauterine device placement; 5) men should not have intercourse when they are drunk, women are weak or both spouses are extremely tired. If you do not have a need for fertility, you must do a good job of contraception. Avoid unwanted pregnancies and irreversible damage to the body caused by multiple abortions for women. The woman’s sperm antibody may be produced in serious cases, which may affect pregnancy later.