I can't find anything specifically on that, ocean.
Maybe somebody will come along and tell us both.
I think at the personal level, Allen believes that life begins when brain waves can be detected. At least that's what he's said in years past. However, I also know him well enough to know that if science proved otherwise, to believe that he'd modify his position.
Whether or not you agree with him on an issue, I know for a fact he doesn't assume a position he hasn't thought through.
That said, as I mentioned above, his record on life issues matches up with anyone's out there. I've got all that stuff in my files somewhere. I'll have to go look for it.