Not that I'm aware of but then I haven't systematically researched GD for several years. Still, if a woman's sugar levels are under control, and she was not a pregestational diabetic, how is she different from a pregnant woman who doesn't have GD? It is also important to remember that inducing labor is not harmless. Among other potential harms, it increases the likelihood of cesarean surgery, especially in first-time mothers. I would ask those who refer to "the studies" for copies so you can educate yourself on this issue. If they have some, I would be happy to review them and comment. 

-- Henci