Premenstrual asthma with seasonal variation.

A 19-year-old woman had premenstrual asthma (PMA) usually from April through October each year with normal and regular menstrual cycles. When the monthly variation in the patient's PMA between 1984 and 1990 was compared with the monthly admissions of children for acute asthma in a hospital in this region, there was a great similarity in pattern between the two. Although she had high sensitivity to house-dust mites, the monthly pattern of her PMA did not coincide with monthly variations in the number of mites in house-dust in her home.