Biggio, Joseph R. Jr; Chapman, Victoria; Neely, Cherry; Cliver, Suzanne P.; Rouse, Dwight J.
Obstetrics & Gynecology. 115(2, Part 1):290-296, February 2010.
doi: 10.1097/AOG.0b013e3181c9b8c3
Although maternal obesity has been associated with the occurrence of congenital anomalies, it may be underlying diabetes, not obesity per se, that increases the risk.