Studies show that in many cases, such depression is related more to the stresses of life such as mid-life crisis than to menopause. They include changes in family roles, such as when your children grow up and leave home (the so-called "empty-nest" syndrome); personal losses such as when a parent, spouse or a close relative dies; as well as your own aging and the beginning of physical illness. Menopause may aggravate underlying anxiety and depression, making you more "vulnerable" emotionally.
i guess from here it shows that mummy is suffering from menopause...
next step is to buy the menopause kit to test!!! LOL.
so ppl, out there, take note of your mum if you cant stand her. LOL :p