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Menopause Health Center

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Your Guide to Menopause

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Menopause is the end of a woman's menstrual cycle and fertility. It happens when the ovaries no longer make estrogen and progesterone, two hormones needed for a woman's fertility, and periods have stopped for 1 year.

Menopause happens naturally with age. But it can also happen as a result of surgery, treatment of a disease, or illness. In these cases it is called induced/surgical menopause or premature ovarian failure.

When Do Women Usually Enter Menopause?

When menopause happens naturally, it tends to happen on average at the age of 51. But for some women it can happen before age 40. This is called premature menopause. The age when women enter menopause is thought to be mostly determined by their genes.

What Are the Symptoms of Menopause?

For many women who enter menopause naturally, their menstrual cycle first becomes irregular. On average, it stops completely within about 4 years. Other symptoms that can happen during this time include:

Some symptoms can last for years and affect a woman's quality of life.

What Are the Stages of Menopause?

Menopause happens slowly over these stages:

  • Perimenopause. In this stage, menstrual cycles are irregular but have not stopped. On average, women are about 47 when they reach perimenopause. About half of all women in the earlier stages to most women in the later stages of perimenopause have symptoms like hot flashes. Women can still get pregnant in perimenopause.
  • Menopause. This is when women have had their final menstrual period. Women will not be able to pinpoint their final period until they've been completely free from periods for 1 year. Hot flashes, vaginal dryness, sleep problems, and other symptoms are common in this stage.
  • Postmenopause. This stage happens after women have had no periods for at least 1 year. Once a woman is past menopause, she will be referred to as postmenopausal for the rest of her life. Note: After more than 1 year of no menstrual periods due to menopause, any vaginal bleeding is considered abnormal.


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