My bipolar comes most likely from my grandfather and so far the only thing my sons got was adhd from my husband and me, they are 22 and 24. They are healthy, well adjusted productive young men and I am very proud of them both. My oldest had school struggles due to his adhd, it just shows me that everyone has something. I could not imagine my life without them. The percentage of heredity is about 15% if one parent has bp according to nami statistics. However, my sons were teenagers when my diagnosis came along.