Most women stop ovulating permanently around age 52, which is the average age of menopause in the United States. But ovulation doesn’t switch off like a light. It tapers gradually over several years, becoming less frequent and less predictable before it stops altogether. The full range is wide: some women reach menopause in their mid-40s, while others continue ovulating into their mid-50s.
How Ovulation Winds Down
You’re born with roughly 500,000 to 1 million eggs. Unlike sperm, which are produced continuously, your egg supply never regenerates. Over the course of your life, eggs are either released during ovulation or naturally break down in a process called atresia. Menopause happens when this supply is essentially depleted and your ovaries can no longer release eggs or produce the hormones that drive your menstrual cycle.
The decline doesn’t happen suddenly. A transitional phase called perimenopause begins about 8 to 10 years before menopause, typically in your early to mid-40s. During this time, your body produces less of the hormones needed to ovulate, so your periods become irregular. You might skip a month, then have two normal cycles, then skip three months. Cycles may be shorter or longer than usual, and your flow can change in volume.
The critical thing to understand about perimenopause is that irregular periods don’t mean ovulation has stopped. If you’re still getting a period, even sporadically, you’re still ovulating at least some of the time. In fact, during perimenopause you can sometimes ovulate more than once in a single cycle. Ovulation only truly ends when you’ve gone 12 consecutive months without a menstrual period. That 12-month mark is the clinical definition of menopause.
When It Happens Earlier Than Expected
For some women, ovulation stops well before the typical age range. When menopause occurs before age 40, it’s classified as primary ovarian insufficiency (sometimes called premature ovarian failure). This condition becomes more common between ages 35 and 40, though it can affect younger women as well. Menopause that occurs between 40 and 45 is generally referred to as early menopause.
Causes of early or premature menopause include autoimmune disorders, genetic conditions like Turner syndrome, and certain medical treatments such as chemotherapy or surgical removal of the ovaries. In many cases, no clear cause is identified. If your periods stop before 40, hormone testing can help determine whether your ovaries have stopped functioning. After menopause, levels of follicle-stimulating hormone (FSH) rise significantly because your brain is trying harder to signal ovaries that are no longer responding.
Factors That Shift the Timeline
Genetics play the largest role in determining when you’ll stop ovulating. If your mother or older sisters reached menopause early, you’re more likely to as well. But lifestyle factors also matter.
Smoking is the most well-documented external factor. Research consistently shows that smoking accelerates menopause by roughly one to two years, regardless of race or genetic background. A study from Penn Medicine found that certain gene variants can amplify this effect in white smokers, pushing menopause even earlier. Body weight, history of pregnancies, and exposure to certain environmental chemicals may also influence timing, though their effects are less dramatic than smoking or genetics.
Pregnancy Risk in Your Late 40s and Beyond
One of the most practical reasons people search this question is to understand whether pregnancy is still possible. The short answer: yes, until menopause is confirmed. Ovulation during perimenopause is unpredictable, not absent. You can go months without ovulating, then release an egg without warning.
That said, fertility drops sharply with age. By your late 40s, the chance of becoming pregnant in any given cycle is around 2 to 3 percent. By age 50, it falls below 1 percent. These are low odds, but they aren’t zero. If preventing pregnancy matters to you, contraception is still necessary until you’ve hit that 12-month mark without a period.
What Happens in Your Body After Ovulation Stops
When your ovaries stop releasing eggs, they also stop producing most of your estrogen. This hormone does far more than regulate your menstrual cycle, and its decline triggers changes throughout your body that unfold over months and years.
Bone density drops more rapidly after menopause, increasing the risk of osteoporosis. Heart disease risk rises to match that of men the same age, a shift largely attributed to the loss of estrogen’s protective effect on blood vessels. Stroke risk doubles with each decade after age 55. About half of postmenopausal women experience some degree of urinary incontinence, and many women gain an average of 5 pounds in the years following menopause.
These changes don’t all arrive at once, and their severity varies widely from person to person. Understanding that they’re linked to the end of ovulation, not just aging in general, helps explain why the timing of menopause matters for long-term health planning. Women who experience premature or early menopause face these risks for a longer portion of their lives, which is one reason early identification is important.