Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Menopause ?
    ### Response:
    Menopause is the time in a woman's life when her period stops. It usually occurs naturally, most often after age 45. Menopause happens because the woman's ovaries stop producing the hormones estrogen and progesterone.     A woman has reached menopause when she has not had a period for one year.
    