Hi Hun. This is something I may have, so I have done a LOT of studying on it!

Once you have been diagnosed, you take Warfarin (NOT aspirin!) during pregnancy; this thins the blood enough to allow the important nutrients to pass through to the placenta and the baby.

If you do a google for Hughes' Syndrome there are some GREAT UK websites which detail all the pregnancy and pre-pregnancy details you will probably ever want to know. It's quite hard to find people who are really up on it (and I live near London, where it was first described!) so it's important to be the informed patient and bring things like essential medication lists to your GP and search the literature (PubMed is a great resource) to back you up.

Best of luck to you.