Menopause represents the end stage of a natural transition in a woman's reproductive life. Menopause is the point at which estrogen and progesterone production decreases permanently to very low levels. In Menopause the ovaries stop producing eggs and a woman is no longer able to get pregnant naturally.
On average, menopause, also known as the "change of life", occurs by the age of 51 and can be confirmed by 12 successive months without menstruation. Contrary to popular use, the term menopause does not refer to the process of hormonal change that results in the end of menstruation and fertility.
Rather, menopause is the end state of that process, the permanent cessation of a woman's menstrual period.
The symptoms for which menopause is known are actually part of perimenopause, the transitional stage between premenopause and menopause.
Once the event of menopause has occurred, a woman is said to be in postmenopause.
REFERENCES:
Christiane Northrup. "Wisdom of Menopause: Creating Physical and Emotional Health and Healing during the Change". Carol Landau & Michele G. Cyr."The New Truth about Menopause: Straight Talk about Treatments and Choices from Two Leading Women Doctors". Carolle Jean-Murat. "Menopause Made Easy: How to Make the Right Decisions for the Rest of Your Life". Germaine Greer. "The Change: Women, Aging and the Menopause".