Well, I think that there is a chance. My grandmother had all of her babies early, my mother had both my brother and me at 38 weeks, and my ds was born at 38 weeks. And he was a first baby! Everyone laughed me off when I said that I wouldn't go to 40 weeks, being a first time mom and all, but I was right! I had a strong feeling that this LO would arrive on or around Thanksgiving Day and lo and behold, I labored all Thanksgiving and gave birth at 2 AM on Friday. I think that it is an awful big coincidence that my grandma, mother, and myself all gave birth around the same gestational week, so I feel like genetics have to be coming into play here.