I was told one to two years, I was actually asked to promise that I would actively prevent it for at least the first year, which I said I would do.
I would definately call your bariatric team and tell them about the pregnancy, I know that the baby will take all of its nourishment from you but that will be at your own expense, you will more than likely need lots of extra vitamins etc to make sure that you dont become ill due to the now even smaller amount of nourishment that you will be getting, so I would definately let them know about it so that you can get all of the goodness you are going to be needing, but I wouldnt wait until 30th September to let them know and get their advice about this, we dont want you poorly.
Congratulations on your new baby and here is hoping for as healthy a pregnancy as possible.
Steph xx