A: As Oestrogen levels fall, we experience less REM sleep, this is the sleep that refreshes, helps memory, mood and energy. Progesterone also falls, this is a natural sedative and helps us drift off, along with Melanin which also reduces with age.
As other hormones fall, our cortisol levels rise, and this is our "fight or flight" hormone which increases our stress response. Read my full blog in the expert articles for help on this
I hope this helps.
Dr Ella Russell