In today's Health Matters, The down economy means fewer workers, and apparently, fewer babies.

In 2007, the US had a record number of births, more than 4.3 million. Since then, births have dropped.

A new Pew Research Center report explains income changes as well as high unemployment and foreclosure rates likely had an effect. This trend falls in line with history.

Numbers show a lower US birth rate during the Great Depression and the oil shock of the 1970s. All because kids are expensive.