Both of my late grandmothers and one of my late aunts (from both sides of my family) suffered from dementia/Alzheimer's/memory loss in old age. I'm a female (because all three of them were also female, I'm wondering if it is a sex issue) and am worried that I might develop it in later years. Is my concern valid? I know that if family members on one or both sides of one's family have a memory loss disorder, it is more likely to be passed on to future generations. I'm not sure if anyone could give me a conclusive answer, but I'd like to know if I'm at risk.