Some would respond by saying that even a rodent wants to live. But what is in the womb of the mother is human. The Bible says for people to protect the weak and down trodden. The mother cries out that the life in here is part of her body and that she has the right to do with her body as she wills. True love does not seeks its own, but is other centered.
Abortion is the ultimate in selfishness.
It puts the mother's convenience and desires above the life of her own baby. To kill the baby in the womb means to consider oneself more important than anyone else. Even in nature, as far as I understand, animals don't kill what is in their own wombs. People are the only ones who kill their young while still unborn. However, there is hope in Jesus.