We examine the impact that medical research published in peer-reviewed journals has on the practice of medicine. We exploit the release of a recent New England Journal of Medicine article which demonstrated that the risks of attempting a vaginal birth after having a previous C-section birth (VBAC) were higher than previously thought. We find that immediately following this article, the national VBAC rate dropped by 16% and this change was largest among more educated mothers, particularly those with a graduate degree.