Thanks ladies, it's interesting that we were all wondering about the same thing.
I actually have an appointment with my Consultant Obstetrician today so if I can the chance (I already have a long list of questions...I'm an information junkie!!) I will ask her that too and share her response with you later.
Jennifer, congratulations on your pregnancy, I hope it is going well so far. As neither of us have underlying blood disorders, I would be interested in what treatment/advice you have been given so far? I've just been told that I'd be on low dose aspirin in any future pregnancy and obviously with lots more checks as it happened so early for me (25 weeks).