Anytime a woman who's calcium has dropped too low, starts the beginning of menopause, regardless of the age.
Therefore when the calcium is in women drops, one of the signs is nervousness, easily upset, cries easily. Except for the grace of God they are hard to live with. When men's calcium drops low they don't go into menopause but they are dog tired at night and when they come home from work because they have been tired all day they too have nervous tension they bark all day and they bark at night.