Asthma and the drugs used to treat it have little effect on the height a child will attain as an adult, new research shows. In a review published in the Archives of Diseases in Childhood, Dr. I. J. M. Doull, of University Hospital of Wales, UK, reports that untreated asthma results in a delay of puberty by approximately 1.3 years. This delay, he says, may explain the perceived growth failure in asthmatic patients.