The stress caused by psychological shock from the 9/11 terrorist attacks, felt even by people with no direct link to the event, may have led to an increased number of male children being miscarried in the US. Researchers writing in the open access journal BMC Public Health found that the fetal death rate for boys spiked in September 2001, and that significantly fewer boys than expected were born in December of that year.
Tim Bruckner from the University of California at Irvine worked with researchers from the University of California at Berkeley to carry out the study. He said, "The theory of 'communal bereavement' holds that societies may react adversely to unsettling national events, despite having no direct connection to persons involved in these events. Our results appear to demonstrate this; as the shocks of 9/11 may have threatened the lives of male fetuses across the U.S."
Bruckner and his colleagues used data from the National Vital Statistics System, which compiles fetal death data from all fifty states of the US, from January 1996 to December 2002 to calculate how many male fetal losses would be expected in a 'normal' September. They found that in September 2001, this figure was significantly exceeded. Speaking about the reasons for this, Bruckner 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."
Notes to Editors
1. Male fetal loss in the U.S. following the terrorist attacks of September 11, 2001
Tim A Bruckner, Ralph Catalano and Jennifer Ahern
BMC Public Health (in press)
During embargo, article available here: http://www.biomedcentral.com/imedia/1547490234330436_article.pdf?random=73392
After the embargo, article available at the journal website: http://www.biomedcentral.com/bmcpublichealth/
Please name the journal in any story you write. If you are writing for the web, please link to the article. All articles are available free of charge, according to BioMed Central's open access policy.
Article citation and URL available on request at firstname.lastname@example.org on the day of publication.
2. BMC Public Health is an open access journal publishing original peer-reviewed research articles in the epidemiology of disease and the understanding of all aspects of public health. The journal has a special focus on the social determinants of health, the environmental, behavioral, and occupational correlates of health and disease, and the impact of health policies, practices and interventions on the community. BMC Public Health (ISSN 1471-2458) is indexed/tracked/covered by PubMed, MEDLINE, CAS, EMBASE, Scopus, Current Contents, FSTA, CABI, Thomson Reuters (ISI) and Google Scholar.
3. BioMed Central (http://www.biomedcentral.com/) is an STM (Science, Technology and Medicine) publisher which has pioneered the open access publishing model. All peer-reviewed research articles published by BioMed Central are made immediately and freely accessible online, and are licensed to allow redistribution and reuse. BioMed Central is part of Springer Science+Business Media, a leading global publisher in the STM sector.
AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.