Do your parents want kids? I've noticed with my own families and a lot on this board that if the parents have a low desire for kids (no way or not really) then they aren't as likely to have a lot of kids.. And they don't seem as likely to care about their children once they do have them. Parents who want kids (definately or it would be nice) seem to be content to have another one as soon as the mother stops carrying around the last one and they seem to interact better with the children.