How convenient! Why do you use that as a test for personhood? Why not wait until the proto-human is able to provide for him/her self? This would give the parents a lot more time to decide whether they want to keep the little bugger. And what is this business about a soul? Why do you use theo-speek for a secular, purely rational decision?
Seriously if your going to use some arbitrary event like drawing the first breath why not use one that gives the prospective parents more freedom to choose. I mean after all that's what it's all about isn’t it? Choice, convenience, etc.
Because that is what I believe.
Why to you pray to Jesus. Why not pray to Odin?