Nice to have you here on the boards....although, sorry you have been diagnosed with AS.
Have you checked out the General Message Board? Someone just posted about pregnancy and AS the other day. I know others have in the past too. If memory serves me right, most have said their AS symptoms go away during pregnancy. But I will leave it up to them to start that discussion with you since my AS came after my three kids were born.
Check out the other boards..and you might even want to post another one on that board as more people tend to read that one over this one.