In general, it is not possible to detect pregnancy after 5 days of intercourse. If a woman has intercourse during ovulation, the sperm reaches the fallopian tube through the vagina, cervix, and uterine cavity, where it just happens to meet with a mature egg, which can combine to form a fertilized egg, a process that usually takes 24-48 hours. The fertilized egg passes from the fallopian tube into the uterine cavity and is then planted in the endometrial layer of the uterus to complete implantation. However, it is usually not possible to detect pregnancy at this time because the body only begins to secrete human chorionic gonadotropin (hCG) about 6 days after fertilization, and peripheral blood hCG can only be detected after the 7th day, so it takes at least 8-10 days after intercourse to detect pregnancy. If you do not intend to have children, it is recommended that you use contraception during intercourse to avoid unwanted pregnancy. If you are preparing for pregnancy, it is recommended that you arrange intercourse during the ovulation period to increase your chances of getting pregnant.