After intercourse, sperm will be ejaculated into the posterior fornix of the woman’s vagina, and then the sperm will move quickly from the cervix into the uterine cavity and then into the fallopian tubes, where it will combine with the egg waiting to form a fertilized egg. If ovulation has not yet occurred, the sperm waits for the egg in the fallopian tube. The sperm survives in the body for 2-3 days, and if ovulation occurs within 2-3 days, it will combine with the sperm to form a fertilized egg, which will clinically result in pregnancy. It takes 1.5 hours for the sperm to reach the fallopian tube from the time of coitus to the time it reaches the fallopian tube, and the longest time it takes is 6 hours to reach the fallopian tube. This is how sperm reaches the fallopian tubes after intercourse. It is recommended to pay attention to hygiene during intercourse and to choose to have sex during ovulation if you plan to get pregnant.