You cannot be deployed once proof of pregnancy has been declared by a Military Medical professional.
You will stay at your home unit during the pregnancy and have Maternal Leave for an amount of time determined by your unit (usually a month give or take).
Now what happens when the baby is born? Well this is where I am not knowledgeable. However if you do stay in the military, you will be eligible to enroll your baby into the installations CDC (Child Development and Care) program.
(EDIT: As long as you or your husband are military or military contractors or federal employees [that work on base], you will have access to CDC. To be more specific concerning my last paragraph is that what priority Tier you are placed in for CDC enrollment will be higher if you both are active duty should you choose not to leave the Army due to pregnancy.)
Who is eligible is based off a Tier system. Seeing as how you and your spouse are dual military, you should be in the second tier (First Tier being those with dire needs like a single mom).
I went through something similar with my wife and my child attends CDC at MacDill AFB and loves it. The school is clean, the staff is very nice and she learns a lot.
Don't quote me on this though as all of this is based off of what I've heard or experienced versus me knowing facts from Rules and Regulations.
Best wishes to you. I wish I knew more exact details.
