Thanks for your persistence in this debate. I'll add a subjective anecdote. My wife and I have 3 kids. We wanted to go for 4 but we had difficuly conceiving. Then she got preganant but unfortunately she miscarried. Again I know this isn't scientific, but there's nobody on this planet that could ever convince me that that baby was any less a son or daughter of mine as the ones I have walking around this planet today. Nope, can't be done. I look forward to the day I meet this child face to face.