If menopause has felt like something happening to you without a clear explanation, here’s the plain-language version of what it actually is.

Menopause is a natural stage of life when your menstrual periods stop, because your ovaries wind down their hormone production. In Canada, most women reach it naturally between the ages of 45 and 55, with the average age around 51. You’ll know you’ve reached menopause once you’ve gone twelve months in a row without a period that’s the official marker.

At that point, your ovaries have largely ended their reproductive function: they stop releasing eggs and produce much less estrogen and progesterone. Those hormonal changes are the real driving force behind the physical and emotional symptoms so many women feel. Menopause can also be diagnosed more immediately when it’s caused by surgery or certain medical treatments that stop the ovaries from working.

Perimenopause: the years before

The transition leading up to menopause is called perimenopause, and it can last anywhere from four to eight years. This is the part that surprises people: hormones don’t decline in a tidy, straight line. Estrogen rises and falls unpredictably, while progesterone gradually drops. Meanwhile, your body tries to compensate by raising follicle-stimulating hormone (FSH) and luteinizing hormone (LH) to encourage the ovaries to keep producing estrogen.

Those fluctuations not just the eventual drop are what bring on irregular cycles, hot flashes, sleep difficulties, and mood changes, often while you’re still having periods.

Perimenopause isn’t a steady decline. It’s a fluctuation which is exactly why it can feel so unpredictable.

What this means for you

Understanding the difference matters: perimenopause is the turbulent transition, and menopause is the milestone you reach twelve months after your final period. Knowing which phase you’re in helps make sense of what your body is doing and what to expect next.

This article is general information, not medical advice. Menopausal hormone therapy is individualized any decision should be made with your own healthcare provider.