If the egg has been discharged at the time of intercourse, the egg and sperm will meet approximately six hours after intercourse; if the egg has not been discharged, the time required will be longer, and the exact time cannot be determined. After intercourse, the sperm will enter the woman’s vagina, and then the sperm will start traveling forward through the tail swing, passing through the woman’s uterine cavity, fallopian tubes, and ultimately reaching the juxtaposition of the fallopian tubes. If the woman has ovulated, the egg will wait for the arrival of the sperm in the potbelly of the fallopian tube. This process takes about 6 hours and if both the sperm and the egg are highly viable, it may be possible to form a fertilized egg. The fertilized egg will then pass through the fallopian tube and enter the uterine cavity, where it will be deposited in the uterine lining and gradually develop and grow. If the egg has not been discharged at the time of intercourse, the sperm can survive in the woman’s body for up to three days. If the egg is discharged during this period, it can develop into a fertilized egg if it can combine with the sperm, which will take a little longer.