Premature Birth

Sara

I'm somewhat already assuming I'm going to have at least a slightly premature birth, but what are the chances? I was a little early/right on time, my brother took 2 extra weeks but on the fathers side his two brothers were preemie, one by 4 weeks and the other by 6 weeks, he was right on time. Does this make it a higher chance to have a preemie or not really?