I have two grown up children and both are fine. The genetic link isn't proven at all. I would say, go for it, and don't worry about passing anything on. Too give life is wonderful. I really do understand about cystic fibrosis, but not for something like bipolar, personally. But that is just my view, I understand. My children have grown up seeing me in various episodes, and both have come to a way of coping which hasn't interfered with their lives.