Experts: Fewer Boys are Being Born, No One Knows Why

chicagotribune.com — "There are global indications that something unusual is going on," said Devra Davis, director of the Center for Environmental Oncology at the University of Pittsburgh and lead author of last year's report. The sex ratio is an indicator of population health, and unexpected changes could be an important signal that people are at risk biologically. May 28, 2008 View in Crawl 4