Welcome!
The pump is simply a tool... a darn good one in my opinion and if you have educated yourself enough to feel that it will benefit you in your pregnancy and beyond, I don't see a single reason why there should be any "cut-off date"... is there a "cut-off date" for changing your insulin regime during pregnancy... so why is this any different? Now I can see the Minimed folks being anxious about liability but I'm sure your agenda is to do the best by yourself and your child. It will require extra work and more frequent testing but with your background I'm sure you already knew that. Best of luck

Frank