Essentially the research suggests that because male and female brain health are co-mingled in most studies, as they are quite similar, neuroscience is missing the effects of menopause and oestrogen in female brain health and female brain health maintenance.
Women endure Alzheimers and other neuro-degenerative conditions at a level 30- 50% higher than men. Some of it is greater longevity. But the rest? A new book The XX Brain by Dr Lisa Mosconi attempts too explain the differences and some of the biases. There's a big article in today's Times (2/6/20) Health section for those who want to know more.