Couples need to have unprotected sex, most of the sperm in the semen will be blocked as well as engulfed by vaginal secretions, and a very small portion of the sperm that are active and good will move upward through the cervical secretions into the uterine cavity and then upward to reach the fallopian tube. If there are oocytes, the oocytes will pass through the ovary’s egg-picking action as well as the peristalsis of the fallopian tube, the oocytes will be in the potbelly of the fallopian tube, the sperm will combine with the oocytes after the sperm movement to the fallopian tube, the head of the sperm will enter into the oocytes through the penetrating action, releasing the genetic material into the oocytes, and the sperm’s tail’s will subside by itself, and the successful formation of fertilized egg will be accomplished, the fertilization will be completed and the fertilized egg will enter the uterus cavity to be implanted, and then the embryo will be Successful conception of an embryo.