Pregnancy begins at implantation. Human life has to begin with conception, but conception is not the same thing as pregnancy, the latter of which reason, science, and medical evidence agree begins when a fertilized egg successfully implants in the uterus and develops into a healthy embryo. Fertilized eggs take between six to 12 days to implant in the uterine lining. There simply is no pregnancy until this happens, which is why any method that prevents fertilization or implantation can not cause an abortion.