Menopause is defined as no menstruation period for continuous 12 months and after 12 months of no menstruation, means you have entered in menopause. This time the ovaries stop releasing an egg every month and menstruation stops. The age a woman experience it can vary and the average age of Menopause is 50. Menopause is a normal part of aging and it can happen after the age between 45-55. In a few cases, a woman can go through menopause at an early age due to surgery, chemotherapy or ovary damage due to a cyst or any other reason.