The process of pregnancy is mainly the union of sperm and egg to form a fertilized egg that is implanted in the uterus, also known as conception. After sexual intercourse there is sperm entering the vagina, passing through the cervix and uterine cavity, then meeting the egg at the location of the fallopian tube, combining to form a fertilized egg, moving towards the location of the uterine cavity, then implanting in the mucous membrane of the uterus and growing and developing, requiring ten months of pregnancy. Therefore, normal sperm, ovarian discharge of mature eggs, open fallopian tubes and normal uterine development are necessary to complete the process of conception. Both partners need to meet the conditions to complete the process, so if you have been infertile for a long time, it is recommended to go to the hospital for examination at the same time. Check the male partner first, there are more causes of infertility in women.