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J Asthma. 2008 Jun;45(5):403-7. doi: 10.1080/02770900801971826.

Fetal sex and maternal asthma control in pregnancy.

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Division of Pharmacy Practice and Department of Family/Community Medicine, University of New Mexico, Albuquerque, New Mexico, USA.


Asthma is a prevalent chronic disorder that might substantially complicate pregnancy. Some recent reports suggest that the presence of a female fetus might be associated with worse maternal asthma symptoms during pregnancy. We tested this hypothesis using the sample of 719 pregnant women with asthma prospectively enrolled in the OTIS study. The presence of a female fetus was associated with a higher incidence of hospitalizations for asthma during pregnancy (OR = 1.84; 95% CI: 1.05; 3.21) independent of maternal age, BMI, ethnicity, smoking, and socioeconomic status. The current study suggests that pregnant asthmatic women carrying a girl might be more susceptible to asthma exacerbations.

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