that if someone with HD has 10 children then on average 5 will inherit the gene and 5 won't. However, there will be some families where less than half of the children will inherit the gene and some others where  more than half  of the children will inherit the gene. Men and women are at equal risk of inheriting the gene. The only certain way to know of if someone has the gene is to have a gene test. If most of those in a particular family who get HD are women then this is just bad luck for them and good luck for the men of the family. If your boyfriend's mum had HD then he is at a one in two or 50:50 risk of inheriting the gene even though he's a man. Dr Andrew Hi. my boyfriends mum has got hd but he is adament he doesn't want to get tested but i have a baby with him..is there any way i can find out if my baby has got it or not? Stacey (19) has just sent in a question. Name: Stacey Age: 19 Question: Hi. my boyfriends mum has got hd but he is adament he doesn't want to get tested but i have a baby with him..is there any way i can find out if my baby has got it or not? Hi Stacey, Thanks for your question. Firstly, regarding your boyfriend's decision not to be tested, the majority of people at risk choose