My auntie had this but didn't know about it.
Have you all spoken to GP/hospital about it? Blood clotting is an issue in pregnancy anyway, but there are treatments to improve blood clotting in preg, I think. Having said this I wouldn't have the foggiest as to how it affected F5L.
No expert, but sure you must be able to get support and treatment.
It turned out my grandmother, my auntie's mother, had it as well and she had 6 babies. Xxx