Interesting concept. I have read several articles regarding the people who terminate an unwanted pregnancy; the info however sharply disagreed with that thesis. Most of the recorded data suggests a much higher socio-economic grouping. In fact the status rankings broken down by race/income/country of origin and geographical placement would indicate the exact opposite. If you look at the household wealth statistics vs the number of children in the household you can get a picture of what that means. Now I am no authority here but what I see is the less total wealth in the aggregate the more children. The more socio-economic distress ( Divorce/addictions etc etc), the greater the average children per individual. Would that fit the data?