Its not just you who has to suffer if your child develops bi-polar down the line, its could be passed down in generations. I do know a doctor in Malaysia who is bipolar and his family really suffer beyond belief. I also believe addictive personalities e.g.. alcoholism is passed on. As others have said, a proven donor was once unproven. If her stats are good, low fsh, high astral follicle count, good health history, doesn't smoke, doesn't drink - I'd 100% go for the unproven given the history of the other own.