Tehran University of Medical Sciences Iranian Journal of Allergy, Asthma and Immunology 1735-1502 13 2 2014 04 15 104 109 EN Katayoon Bidad Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran Hassan Heidarnazhad Tobacco Prevention and Control Research Center, National Research Institute of Tuberculosis and Lung Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran Zahra Pourpak Immunology, Asthma and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran Giti Shayestefar Department of Obstetrics, Arash Hospital, Tehran University of Medical Sciences, Tehran, Iran Heshmat Moayeri Department of Endocrinology, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran Nasrin Zendehdel Department of Internal Medicine, Shohada Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran 2015 10 16 Asthma and  gastroesophageal reflux disease (GERD)  are two  common  problems  in pregnancy and they affect pregnancy in several ways. In this study, we aimed to evaluate GERD and asthma in pregnant women who referred for prenatal care visits. One-hundred  and seventy three  pregnant  women with a complaint of  dyspnea were included in the study. A questionnaire was filled and lung function tests were performed. All patients  were visited by a respiratory specialist and  questionnaires were evaluated by a gastroenterologist. Out  of the total number of women studied, 37% were diagnosed to have asthma and 36.4% were non-asthmatics. Twenty six percent of the pregnant women who had symptoms and signs of asthma with normal spirometry were classified as probable to have asthma. GERD was diagnosed in 80.9% of the pregnant women, but it was not significantly higher in asthmatic or probable asthmatic women compared to non-asthmatic ones. However, severity of GERD was significantly higher in asthmatic pregnant women compared to the others. In conclusion, the prevalence of GERD  was quite high in pregnant women, irrespective of the fact that they were asthmatic or non-asthmatic. Further studies evaluating women throughout pregnancy will inform us more about this relationship. https://ijaai.tums.ac.ir/index.php/ijaai/article/view/469 https://ijaai.tums.ac.ir/index.php/ijaai/article/download/469/368