By Madison Park, CNN
(CNN) -- The shock and stress felt by pregnant women after the terrorist attacks on September 11, 2001, may have contributed to an increase in miscarriages of male fetuses in the United States, according to a study released Monday.
Researchers found the male fetal death rate increased in September 2001 and subsequently affected the ratio of boys born in a later month, according to the study published in the journal BMC Public Health.
The authors hypothesized that this might be a case of "communal bereavement." Even without direct relationships with the deceased, pregnant women may have been distressed by the attacks, resulting in miscarriage, according to the research.
"A huge population saw the consequences and carnage onscreen," said lead author Tim Bruckner, who is an assistant professor of public health at University of California Irvine, about the effects of 9/11. He examined this topic "because pregnancy is sensitive to stressors. I wondered whether pregnant women might have a physiological reaction to witnessing harm". Link
