my honest reaction is that i don't think they consider the fact in and of itself, unless, as others have stated, you thoughtfully illustrate for them how it relates your decision or to what you deem to be your potential contributions. parents come in all types and giving birth is a much more natural skill than working in a soup kitchen, after all (that's says nothing for parenting, but you mentioned actually giving birth).
i would steer clear of the "more relevant than..." arguments, b/c one rarely comes off positively when they attempt to illustrate their worth at the expense of someone else's. also, for all your perceived greatness, there's someone out there--childless as can be--(and who's likely worked for a soup kitchen) who's going to come across as ten times the applicant you are. prepare yourself for this reality. just be great no matter what.