NOT all the victims of 9/11 died in the towers or the crashed planes. A higher than average number of male fetuses died in the US in the following months, a study of birth rates suggests.
At times of great stress, such as the social and economic turmoil that followed the reunification of Germany in 1990, sex ratios become slightly skewed towards females (Â鶹´«Ã½, 30 August 2003, p 20). But until now it has not been clear whether this is because fewer males are conceived, or whether fewer males already in the womb survive.
Ralph Catalano’s team at…
