Oh boy is there a genetic link Nic, my mother had it with my brother and sister and my grandmother had it with two of her five pregnancies. So far though Dannii is the only one that had developed HELLPS though, I think she was told after Brae was born that there was a 60% chance of her having it again with any subsequent pgs.
It's kinda funny in a way when I was in hospital before I had Phoebe the Ob's and physicians at the RBWH explained the whole PE thing to me and the main focus was put on my weight as the main contributing factor they went on to tell me all the others but not once did they mention any genetic predisposition to the condition huh!!