The study found that dementia was linked to hormone changes in women, including pregnancy.
Los Angeles Times: How Pregnancy And Childbirth May Protect Some Women From Developing Dementia
Women make up some 60% of Alzheimer’s disease patients in the United States, and over her lifetime, a woman is almost twice as likely than a man to develop the memory-robbing condition. New research offers tantalizing clues as to why that might be, suggesting that either hormonal influences or pregnancy-related changes in the immune system – or both — may nudge a woman’s risk for dementia in one direction or the other. (Healy, 7/23)