A study in BMC Public Health found 12% more male babies were lost in September 2001 after the 20th week of pregnancy than in a "normal" September.
Data says fewer boys were born in all states three to four months after 9/11....
Dr Tim Bruckner, who led the research at the University of California, Irvine... said: "Across many species, stressful times reportedly reduce the male birth rate.
"This is commonly thought to reflect some mechanism conserved by natural selection to improve the mother's overall reproductive success."
May 25, 2010
This is strange: