Abortion is murder. So why would you even ask this question?
Abortion kills a human being. There is no logical reason why a state can constitutionally have a law that legalizes killing human beings at one point in the life but it is not constitutional for states to have a law to have a law that legalizes killing human beings at another point in their life.
Even abortion promoters admit that abortion is killing a human being. It’s not removing a clump of tissue or a rabbit.