Yes, a lot of people on the board are parents, with or without ich symptoms, who have had children, and some children are affected and some are not.
You are touching on one of the most sensitive issues on this board---having children and passing on the ich genes and conditions. Understandably strong feelings on both sides.
Others can speak more confidently about genetic inheritance than I do. What the odds are, etc.
I think much depends on the type of ich and whether both sides of the family carry the genes. For vulgaris I think it is much more prevalent in subtropical and tropical areas, and in some locales, such as parts of southern China, you would find both sides of the family carrying the gene, and children would be affected to a greater or lesser extent based on the roll of the genetic dice.