I don't know how much truth there is to this (5 different doctors, 5 different opinions), but I had been taking prescription diet pills for two weeks when I found out I was 4 weeks pregnant with my second child (I'm 5'3 and weighed a little over 200lbs at that time) and my OB said the baby is very protected, esp in the beginning development. If something were to affect it, it would usually end up as a miscarriage. Now that's not "always"
true, but try not to worry and add stress.
That's easy advice to give, I would worry too! Sorry. I am trying to help ease your fears though.
I don't think finding out the HLA-B27 status is a good idea. That's just my opinion. If it's positive, it'll be on all the records which could cause a hinderance somewhere down the line, and you will constantly worry, when your child may be positive and never develop symptoms. Just a thought.
I don't have AS, but thanks for sharing that-it'll help many on this board. It's also good to know that you can still have a few periods when you are pregnant. I had one, with my last child.
Please keep us informed on how the tests go and how your pregnancy progresses. We'll help pick out names for the baby!