EurekAlert -- New research shows that during natural menstrual cycles, women with asthma who were not taking oral contraceptives (OC) had lower exhaled nitric oxide levels (eNO), a marker of airway inflammation associated with asthma, than women who were taking OC. Researchers from McMaster University in Hamilton, ON, Canada, studied 17 women with asthma during their menstrual cycles. Results showed that individuals not using oral contraceptives (OC) had higher mean eNO levels than women using OC.
