You'll pretty much be responsible for your initial schedule. A lot of the items that need to be accomplished are classes that are only offered once a week or once every other week as well as CBT's that need to be done. If you take too long, an ADO or DO might get involved, but as long as you show progress, they usually don't say anything.
Most of the squadron's are also really good about putting individuals on "baby hold". Usually it starts around two or three weeks prior to the due date and lasts until the baby is born. If complications arise, they may even start it earlier. (Of course this is all dependant on nothing else major happening - tsunami, earthquake, another war, etc.)