I don't have it but I know there is someone on here that does. I think she may be in the older ladies TTC forum as I used to chat there, but I'm not sure, you could try dropping by there and asking, I'm sure they wouldn't mind. It can cause miscarriages, but not in all women who have the gene. From what I remember the really high dose folic acid was the main thing that is recommended for it - like 10 times the usual dosage - I think you have to get it from a chemist. The other treatment was low dose aspirin (I think this is to prevent clotting which can be caused by this gene). I'd go with the docs advice and see what happens. Best of luck with your next pregnancy.