The American College of Obstetricians and Gynecologists (ACOG) published a Practice Bulletin concerning emergency contraception online August 19 and in the September issue of Obstetrics & Gynecology. The new recommendations, which update those published by ACOG in May 2010, include an expanded discussion and guidance on the use of ulipristal acetate and new data regarding the effect of body weight on emergency contraception efficacy.