Perimenopause, menopause, post-menopause: the words get used interchangeably, which makes it confusing to work out where you actually are, or whether what you're feeling “counts” yet. Here's the plain-English version.
The difference, simply
- •Perimenopause is the transition: the years when your hormones start fluctuating and falling, but you're still having periods (however irregular). This is when most symptoms actually happen, and it can last several years.
- •Menopause is technically a single point in time: 12 months after your last period. On average it's around age 51 in the UK, but it varies widely.
- •Post-menopause is everything after that point.
The key thing most women don't realise: perimenopause is where the action is.You can have significant symptoms for years while your periods are still coming, long before you reach “the menopause” itself.
Common early signs of perimenopause
It often starts with your periods changing, but the first thing you notice might be something that seems unrelated:
- •Periods changing: closer together, further apart, heavier or lighter
- •Hot flushes and night sweats
- •Disturbed sleep and waking in the early hours
- •New or sharper anxiety, low mood or irritability
- •Brain fog, poor concentration and word-finding trouble
- •Joint aches, fatigue, and changes in libido or vaginal comfort
How to tell where you are
For most women over 45, perimenopause is diagnosed from your symptoms and your changing periods, not a blood test: NHS guidance notes hormone blood tests are often unhelpful in this age group because levels swing so much day to day. The most useful thing you can do is track your symptoms and cycle over a few months and take that to a GP or nurse prescriber, who can piece it together with you.
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Frequently asked questions
What is the difference between perimenopause and menopause?
Perimenopause is the transition, when hormones fluctuate and fall but you're still having periods, and it's when most symptoms happen. Menopause is a single point: 12 months after your last period. Everything after that is post-menopause.
How do I know if I'm in perimenopause?
For most women over 45 it's identified from symptoms plus changing periods, not a blood test. Common signs include irregular periods, hot flushes, disturbed sleep, anxiety or low mood, brain fog and joint aches. Tracking your symptoms and cycle and discussing them with a clinician is the clearest way to tell.
Can I have menopause symptoms while still having periods?
Yes, and it's very common. Most menopausal symptoms happen during perimenopause, while periods are still coming (often irregularly), sometimes for years before your periods stop.
At what age does perimenopause start?
It varies a lot. Perimenopause often begins in the mid-40s but can start earlier, and menopause in the UK is on average around age 51. Some women reach it earlier, including early or premature menopause.
Do I need a blood test to diagnose perimenopause?
Usually not if you're over 45. NHS guidance notes hormone blood tests are often unhelpful then because levels fluctuate day to day, so diagnosis is based on your symptoms and periods. Blood tests are more relevant for younger women.
