I have a story up on theAtlantic.com site about birthrates and childcare: here. The story was published with a confusing title, which was soon changed to the current title (same as here), so got some confused comments in response initially.
The economic roots to the ongoing trend to delaying motherhood have become only more clear in the recent recession. But economics has been a motivating factor all along, since the 1960s when the trend began. (Numbers of first births to