Pre and post menstrual peak flow rates and symptoms amongst patients with bronchial asthma.

the fall in progesterone concentration in the late luteal phase might be associated with the withdrawal of relaxant effect on bronchial smooth muscles. Some asthmatic patients experience improved pulmonary function and reduced asthma medication requirement during pregnancy. To conclude, premenstrual exacerbation of asthma occurs in a significant proportion of female adult asthmatics. Thus proper history including menstrual variation of asthma of all these patients should be taken for effective management.