It is not always safe to have intercourse within five days of the end of menstruation, and it is recommended that contraceptive measures be taken under the supervision of a doctor. Ovulation occurs around the 14th day before the next menstrual period, and the four days before and after ovulation are the ovulation period, when intercourse can increase the pregnancy rate. In the end of menstruation within 5 days of intercourse, due to the sperm can survive in the body for 2 to 3 days, there is the possibility of early ovulation, so this time intercourse is not absolutely safe, there is still the possibility of pregnancy. Therefore, safe period contraception is not very reliable. For women who do not want to have children, it is recommended to take safe and effective contraceptive measures under the guidance of a doctor. Under the guidance of a doctor, you can choose to place an intrauterine device, oral short-acting contraceptive pills and wear condoms and other contraceptive measures to achieve the purpose of effective contraception.