By the way, doctor: Does hormone therapy cause dementia?
These findings don't square with animal and laboratory studies suggesting a favorable effect of estrogen on cognitive function. And there's strong biological evidence that estrogen is important for brain function in women. Estrogen receptors are found throughout the brain, and many interactions take place between the brain and the reproductive endocrine system. Some research suggests that ovary removal during hysterectomy increases the risk of cognitive problems, presumably due to the loss of estrogen.
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