Intercourse on the 7th day of your period does not usually result in pregnancy. However, there are a few cases of irregular menstruation that lead to irregular ovulation and thus pregnancy. For women with regular menstrual cycles, if intercourse occurs on the 7th day of menstruation, the chances of pregnancy are very low because no eggs are ovulated during this period. However, if the patient has decreased ovarian function and the follicle stimulating hormone is high, it is possible that a mature follicle may be formed on the 7th day of menstruation and pregnancy may occur. However, intercourse is not recommended during menstruation because the uterine opening is still dilated, the endometrium may not be completely shed, and there may still be a small amount of blood in the uterine cavity and vagina. Intercourse may lead to infection and may also cause the menstrual blood to flow backwards and endometriosis may occur. It is recommended to have intercourse after 3 days of clean menstruation and to take precautions to prevent unwanted pregnancy. During menstruation, patients should not take a sitz bath, tub bath or swim to avoid bacterial invasion and inflammation. Patients should also pay attention to personal hygiene and keep the perineum clean to avoid bacterial growth. Avoid getting cold and eating cold, cold foods to avoid increased menstrual flow and prolonged periods.