Low estrogen causes fat to be stored around the midriff. The body does that because visceral fat (around the tummy) contains estrogen and the body is trying to compensate for the lower production of estrogen from the ovaries.
Many studies show that during menopause, sleep can get badly disrupted. Insomnia becomes an unwelcome guest in the bedroom. Night sweats add a less than charming touch to the scene. You are exhausted but can’t get to sleep.