I don't think you have too much to worry about. The odds are in your kids' favor. Although in respect to full disclosure I have seen %s between 10% and 25% if one parent has UC. Depends on what survey you look at. Having a 10 year old who was diagnosed with UC when she was 6 I like to think it's 25% so I can feel like she didn't just end up with that much dumb luck