60-70. cag rpt 41. similar to fathers. - Patrick (32) Hi Patrick, Thanks for your question. There is currently no precise way to predict when a gene-positive person will begin to show symptoms. While a higher CAG repeat is generally corellated with earlier onset, this can't be taken as a rule as there are a great deal of factors which contribute. While there is currently no cure, there has been a lot of promising research around 'environment enrichment'. That is, studies have shown that by exercising, keeping your mind active, and eating the right foods people who are gene-positive may be able to delay symptom onset and lessen the severity of symptoms. Click here for more information. I want to know more about general insurance. - Kingsley (29) My daughter is pregnant and her unborn child's father's grandfather has HD. None of his grandfather's children contracted the disease. What is the liklihood of the baby being at risk? - Marie (54) Hi Marie, The risk of your unborn grandchild inheriting Huntington's Disease is dependant on the 'gene status' of their father (I will call him Tom for the sake of brevity), which is also dependant on the gene status of Tom's parents. When people have their genes tested for Huntington's Disease it is to find out if they have a normal or faulty Huntington's gene. They receive a number called a CAG repeat length which tells us how faulty the gene is and can fall within four main categories: 1.Gene-negative: