Several Protestant denominations take an official position on abortion that it can be acceptable under certain circumstances, and that in those circumstances the choice can be made by the woman.
Views on those circumstances differ, but can include cases where the mothers life is in danger, or the baby will be severely deformed, or is the product of rape or incest.
Still, some people who claim to be Christians believe that abortion is acceptable even when it is unnecessary for any reason (when the life of the mother is not at risk, and the baby is completely healthy and there was no rape or incest).
This other question asks for the biblical basis for the immorality of abortion.
What specifically is the biblical basis for the claim that abortion is NOT immoral, as many other Christians claim it to be, when it is purely elective?