Editorials: PDF OnlyExercise and Spontaneous Abortion of Known KaryotypeLatka, Mary; Kline, Jennie; Hatch, MaureenAuthor Information Division of Epidemiology, Columbia University School of Public Health, New York; Epidemiology of Developmental Brain Disorders Research Unit, New York State Psychiatric Institute, New York; Sergievsky Center, Columbia University, New York; and Department of Community Medicine, Mount Sinai School of Medicine, New York, NY. Epidemiology: January 1999 - Volume 10 - Issue 1 - p 73-75 Free Abstract We examined whether exercise during pregnancy is associated with chromosomally normal spontaneous abortion. We hypothesized that associations would be confined to chromosomally normal losses since only these can be influenced appreciably by experiences during pregnancy. The study population comprises women with chromosomally normal (N = 173) and aberrant (N = 173) losses. Women who exercised during pregnancy had a lower risk of a chromosomally normal spontaneous abortion (OR 0.6; 95% CI 0.3–0.9). Other types of physical activity had little effect. (Epidemiology 1999;10:73–75) © 1999 Lippincott Williams & Wilkins, Inc.