Asthma may delay pregnancy

Women with asthma may take longer to get pregnant, a study suggests. Danish researchers say difficulty conceiving is more likely in those over 30 and when asthma is more severe. They say this suggests that inflammation associated with asthma has an impact on fertility. UK experts say the findings underline the importance of getting asthma symptoms under control. Study of twins Scientists from Bispebjerg University Hospital analysed questionnaires completed by 15,250 Danish twin sisters aged between 12 and 41 who had been asked about their fertility and whether they had asthma. Twins were used in the study so that genetic