- Lacey (16) Hi Lacey, We are sorry to hear about the passing of your mother. It is great that you would like to get involved with a HD association. If you are in Australia the best place to get connected would be the Australian HD Youth Alliance, for more details email This e-mail address is being protected from spambots. You need JavaScript enabled to view it or you can find us on Facebook. You can also link in with your state HD association. Feel free to ask any other questions and let us know which state you are situated in to give you more specific contact details. If I'm the youngest in a family with 4 brothers and 2 sisters and my parent had hd does that make me more likely to have it? - Tom (27) Hi Tom, If you have a parent with HD your chance remains 50% regardless of how many siblings that you have. Also, whether or not your siblings inherit the gene does not have any bearing upon the likelihood that you have it. If all of them are gene-negative (won't develop HD) then it doesn't mean that your chance of getting HD is any higher or lower. The case is the same if they were all gene-positive. Your chance would still be 50-50. I hope this helps. my grandad died of hd my dad was tested and had negative result but i seem to have symptoms (anxiety depression memory loss e.g is it