Sperm and egg combination to conceive life is a very wonderful process, as follows: 1, men should have normal vitality and good quality sperm discharge, women should have mature follicles, sperm discharge through the cervix, into the uterine cavity and then into the fallopian tube to wait for the egg, under normal circumstances, sperm can survive here for about 3 days, even if the time is longer even if the survival of the ability to fertilization will be lost, the egg is discharged by the umbrella pick up back to the tubal abdomen. 2, fertilization is also a very complex physico-chemical process. After the ovum is discharged, it is picked up by the umbrella of the fallopian tube and returned to the juxta-pubic area of the fallopian tube, and if it encounters a sperm, it will begin to be fertilized.2. Fertilization is also a very complex physicochemical process, and sperm will be energized by contact with the outer membrane of the ovum and will pass through the zona pellucida and crown of the ovum through the acrosome reaction to ultimately enter into the oocyte and the fusion of the oocyte to form a fertilized egg. The fertilized egg, with the help of peristaltic movement of the fallopian tube and the swinging of the cilia, can enter the uterine cavity and bury itself in the endometrium to complete the process of implantation and develop into a fetus.