This study is inherently flawed. The study does not separate the willfully childless, and the childless who have fertility problems, which could indicate major health issues.

This seems to nothing but an embarassing attempt at what I refer to as "Pop" science, i.e. vague studies that are boiled down into catchy or controversial titles for magazines such as Cosmopolitan.

This is a topic that has much potential, it's a shame to see it done so poorly.