So i came across this chart someone posted on their blog. I can not remember whose it was so I'm sorry for not giving you credit. But I saved it so Jeff and I could look at it. Our plan is to start having kids 27ish, well I say 25/26 he says 27/28. But its interesting to see predictions of when its good to have boys or girls. Figured some of you may be interested in it as well, so enjoy!