As an alternative approach to your dating, a bit more on a logical level:
Do you have a list of "must have" values in your future mate?
If so, instead of falling for someone, dating them, finding out you are compatible/incompatible why not mix it up?
Why not date someone, find out if they are compatible within 2 or 3 dates and move on, or move forward?
You'll still have a chance that things don't work out of course... but at least you'll know at date nr. 1 that he doesn't want kids, before you get emotionally involved with all the feelings and heartache that follows that.