Between ages forty-five and fifty a woman passes through a transition period brought about by a decrease in the production of hormones by the ovaries. During this period, menstruation becomes irregular and eventually ceases. Thereafter pregnancy is no longer possible.
Many women experience some nervousness during this time A typical sign of the onset of menopause is "hot flashes," when the woman experiences a sudden, intense feeling of warmth with flushing of the skin of the face, neck, and chest. She wants a breath of fresh air and may fan her face. The flash lasts from a few seconds to a few minutes and may recur several times a day or at irregular intervals for months or even a few years. They can be modified, usually, by appropriate endocrine substances.