Does obesity increase the risk of developing asthma?

This study is investigating whether obesity increases the risk of developing asthma in women. Some research suggests that being overweight may cause changes in the airways that can lead to asthma. Researchers will compare obese and non-obese women — both with and without asthma — to look for differences in airway inflammation and breathing tests. You may be eligible if: - You are a female - You are either obese (BMI above 32) or a healthy weight (BMI below 25) - You may or may not have asthma (both groups are needed) You may NOT be eligible if: - You are male - You are a smoker - You are pregnant or breastfeeding - You are using oral steroids - You are using hormonal replacement therapy or contraception Talk to your doctor about whether this trial might be right for you.