The European Journal of Public Health Advance Access published online on August 10, 2005
The European Journal of Public Health, doi:10.1093/eurpub/cki052
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1 Istituto di Ricerche Farmacologiche ‘Mario Negri’, Milano, Italy; Prima Clinica Ostetrico Ginecologica, Università di Milano, Milano, Italy
* To whom correspondence should be addressed. We have analysed data collected on 1,962 women who gave birth at 37 or more weeks of gestation to health infants (excluding those with a low birth weight and twins). In comparison with non-smoking parents, the odds ratio (OR) of being male was lower than unity for offsprings of both smoking parents, but no clear relationship however emerged between the risk of giving birth to a male, and the number of cigarettes smoked per day. Read all E-letters
Received March 31, 2004
Accepted July 22, 2004
Article
Periconceptional smoking and male:female ratio of newborns
2 Istituto di Ricerche Farmacologiche ‘Mario Negri’, Milano, Italy
3 Prima Clinica Ostetrico Ginecologica, Università di Milano, Milano, Italy
4 Clinica Ostetrico Ginecologica, Università dell'Aquila, Aquila, Italy
Fabio Parazzini, E-mail: parazzini{at}marionegri.it
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