Testosterone could explain why asthma is more common in women than men

Boys are more likely to have asthma than girls, but the situation reverses with adolescence, prompting researchers to examine role sex hormones might play

The puzzle of why asthma is about twice as common in women as men may have been solved, according to researchers who say it might partly be down to testosterone.

While boys are about 1.5 times as likely to have asthma as girls, the situation changes with adolescence - a factor that has led scientists to probe whether sex hormones could be behind the trends.