In almost every case that a child is aborted, the child is unwanted. Wether the child was created out or rape or stupidity is irrelevant. The child is unwanted. The child would not recieve proper care or love. What is a greater sin; Stopping a child from being born or bearing a child the parents cannot or will not provide for? I say better the stop the child from being born in the first place.
Who is to say what goes on in the birth of a child. I say it is just a chemical reaction. All of us are chemical reactions. NO immortal soul but a very very old and complex and majestic chemical reaction. But if you want to talk souls.... How do you know when the soul enters the body of a person. God BREATHED life into Adam. Maybe that means We have to breathe in order to get our souls. A baby that can't breathe at birth dies correct. Maybe the fetus is only a physical shell that lacks a soul so killing it is not murder.
One more thing: If a life that could have been but wasn't is a murder then when a woman has her period or a man jacks off he or she kills a life that could have been (in the case of men he kills millions) should that also be illegal. What about intercourse as well. There are a couple million sperm and only one fertalizes the egg, the rest die. The rest could have been alive but the don't make it. Is that also murder.
We are animals, we evolve, we are walking melenia old miracles; get over it. If the baby isn't wanted, it shouldn't be. There are too many people on the planet for the planet to sustain. Let some of the unwanted ones not be.