Does Menopause Affect Memory?

I've heard that a woman's memory is worse after menopause, is this true?

Many women do believe that their memory worsens after menopause. Menopause is characterized by declining levels of estrogen, and estrogen is known to have effects on the brain and nervous system, including playing roles in the signaling system of the brain and control of blood flow within the brain. A decrease in estrogen levels, therefore, might reasonably be expected to alter the function of the brain.

However, a controlled study published in 2003 of brain function in over 800 women who were either premenopasual, going through menopause, or postmenopausal failed to show any decline in brain function associated with menopause. Newer studies have confirmed that memory, per se, appears not to be affected by menopause, but that women approaching menopause who complained about memory loss had, instead, difficulties encoding or processing new information.

The exact relationship of brain function and menopause is unclear, and further research is needed to clarify the complex interaction of changing hormone levels on brain function. One compounding factor is that many women who are approaching menopause lead very hectic, stressful lives and may experience anxiety and/or depression, both of which can affect retention and learning skills.