The process of egg fertilization is usually done in the fallopian tubes. After intercourse, if ovulation has not yet occurred, the sperm reaches the fallopian tube area first where it waits for the egg. If ovulation has occurred, the egg will enter the fallopian tube in ten minutes under the umbrella of the fallopian tube, and the sperm and egg will unite in the fallopian tube to form a fertilized egg. The fertilized egg gradually enters the uterine cavity under the peristaltic movement of the fallopian tube, and then lays, grows and develops in the uterine cavity, which is the whole process of pregnancy. If you have already ovulated at the time of intercourse, the egg is already in the fallopian tube at this time, and the sperm will arrive in the fallopian tube in one and a half hours at the earliest and six hours at the slowest, and then the two will unite to form a fertilized egg.