1. There was never a "right" to abortion in the US Constitution, neither explicit nor implicit. A right to kill an unborn child? Where in this document does it say this is OK, or that abortion is a right that the government should defend?
2. In the case of pregnancy resulting from rape or incest, many people feel that the woman-or girl- involved should not be saddled with carrying such a burden and restriction on their lives. Time and money at her expense, an interruption of her life, etc., etc., as well as the psychological damage this might cause her. All of these arguments simply state that a human being born from rape or incest does not have the right to live, if the mother so chooses. Of course all of this is horrible, a hideous thing to happen to a woman or girl. Does that mean that the baby should die? The pro-choice people say "yes".