Human pregnancy requires this process of sexual intercourse, the formation of a fertilized egg, and the implantation of the fertilized egg. 1. Sexual intercourse: human pregnancy requires both men and women to have the ability to procreate, choosing a woman to have sexual intercourse after a mature follicle is discharged, and the man ejaculates semen into the woman’s body, and then there is a possibility of pregnancy. 2. Formation of fertilized egg: after sexual intercourse, the sperm enters the uterus from the vagina through the cervix and passes through the uterus to reach the fallopian tube, where the sperm and the egg are combined and fertilized in the jugular area of the fallopian tube to form a fertilized egg. 3. Fertilized egg implantation: the fertilized egg moves slowly along the fallopian tube and enters the uterine cavity after 3~4 days, usually starts to implant in 6~7 days, and implant completely in 11~12 days, slowly develops to form an embryo, and the woman will be pregnant. Conception is a more complicated process, whether or not you are pregnant after having sex, you have to go to the hospital to determine through examination.