It is up to the person if they choose to create a new life. When doing so, they are taking on the responsibility of parenthood, and should not be able to waive their choices as a "mistake". Everyone that commits a sexual act is concious to the fact that a child may be conceived. Knowing this, they need to take full responsibility to parent the child when it is born, or unborn. You need to live up to the choices you make, and cannot take the easy way out, i.e. abortion. Legally definining the beginning of life at conception would insure that all future humans will be protected under the Constitution and make sure that the new parents take responsibility for their actions, and give the new child the life it deserves.