Have your periods started changing? Hot flushes, broken sleep and mood swings that seem to come from nowhere can all be perimenopause symptoms, and they often begin years earlier than women expect.
Perimenopause is the transition leading up to menopause. The symptoms can be confusing, and it isn't always obvious what's happening or why.
This article is written for women and individuals assigned female at birth (AFAB) who are noticing changes in their body, mood or cycle in their late 30s, 40s or early 50s. Not every woman's experience of perimenopause looks the same.
Understanding what perimenopause is, and what's happening in your body, makes this stage a lot less confusing.
What Is Perimenopause?
Perimenopause means “around menopause”. It's the transition your body goes through as your ovaries gradually produce less oestrogen and progesterone, in the lead-up to your final period.
According to Jean Hailes for Women's Health, perimenopause typically begins in a woman's mid-40s, though for some women it starts earlier, in their 30s. On average it lasts 4 to 6 years, though for some women it's as short as 1 year and for others closer to a decade.
Menopause itself is a single point in time: the day that marks 12 months since your last period. The average age of natural menopause in Australia is 51. Perimenopause is everything that happens on the way there.
How Perimenopause Differs From Menopause
The word menopause gets used as a catch-all for this whole stage of life. In clinical terms it's one day, the point 12 months after your last period. Everything before that, while your hormones are fluctuating and your cycle is changing, is perimenopause.
The distinction matters because perimenopause is when symptoms tend to be least predictable. Hormone levels swing during this stage, sometimes within the same week. That's part of why symptoms feel so changeable, and why some months are much harder than others.
Common Signs and Symptoms
Perimenopause symptoms are wide-ranging, and no two women experience them in quite the same way. Physical symptoms often include irregular periods, hot flushes, night sweats, sleep problems, headaches, joint aches, breast tenderness, vaginal dryness, changes in libido and shifts in weight.
Emotional and cognitive symptoms are common too. Mood swings, anxiety, low mood, irritability and brain fog can all appear during perimenopause, sometimes before any change in your periods is obvious.
The scale of this is larger than many women realise. In 2026, Women's Mental Health Australia surveyed 9,000 Australian women and found that perimenopausal anxiety and depression affects nearly 1 in 2 women currently going through perimenopause (49%). Women in perimenopause also recorded higher average psychological distress than women who weren't (a K10 score of 24.0, against 22.7).
Symptom severity varies widely. Research suggests around 1 in 5 women move through perimenopause with no noticeable symptoms, most notice mild to moderate changes, and around 1 in 5 experience symptoms severe enough to disrupt daily life (Jean Hailes for Women's Health).
How Perimenopause Is Diagnosed
For most women, no test is needed. Perimenopause is usually diagnosed based on your age, your symptoms and changes in your periods (healthdirect Australia).
A blood test measuring FSH (follicle-stimulating hormone) may be used if you're under 45 and your symptoms are unclear. For most women in their mid-40s and older, a conversation with your GP about what you're experiencing is enough.
If you notice very heavy bleeding, bleeding that lasts a long time, or bleeding between periods or after sex, see your GP promptly. These have a range of causes and are always worth checking.
A note from our clinicians
In our work with women in perimenopause, one theme comes up again and again. Women describe not knowing what was happening to their bodies and minds, and wishing someone had told them sooner. Perimenopause can start years before periods stop, and the emotional symptoms often arrive before the physical ones are obvious. Putting a name to it is usually the first relief.
A Story Many Women Recognise
Louise is a fictional example, based on experiences many women share.
Louise is 44. Her periods have become unpredictable, sometimes early, sometimes late, occasionally heavier than she's used to. She puts it down to stress.
Over a few months she notices she's more anxious than usual. Some nights she wakes at 2am and can't get back to sleep. She assumes she's just busy.
When Louise mentions all of this to her GP, almost as an afterthought, her GP asks a few more questions and explains that the pattern fits with perimenopause. Louise is surprised. She thought she was too young.
Having a name for it changes things. Louise begins learning what might help, and stops wondering what's wrong with her.
Signs you might be entering perimenopause
- Your periods becoming irregular, heavier, or closer together than usual
- New or worsening anxiety, low mood, or irritability
- Sleep that's harder to fall into or stay in, even without night sweats
- Hot flushes or night sweats that come and go
- Brain fog or difficulty concentrating
- Changes in libido or vaginal dryness
- Joint aches or headaches that feel new for you
What Can Help
Perimenopause is a normal life stage, and there are still things that make it easier to move through.
Speaking to a GP about your symptoms is a good starting point. Options can include hormone therapy, non-hormonal medications for specific symptoms, and targeted support for sleep or mood.
Regular movement, consistent sleep routines and stress management all support how you feel, though they won't remove hormonal symptoms entirely.
Psychological support can help too. Perimenopause affects mood, identity, sleep, relationships and confidence at work, often at the same time. Talking to a psychologist who understands this stage of life helps you make sense of what's changing.
How Pivotal Women's Psychology Can Help
At Pivotal Women's Psychology, we support women and AFAB individuals through life's pivotal transitions, including perimenopause and menopause. We offer telehealth appointments across Australia, and for Australian and English-speaking women living overseas, so support is accessible wherever you live.
Perimenopause reaches into mood, identity, sleep, relationships and work, often all at once. We work with whichever part of it is affecting you most.
Our approach draws on evidence-based therapies including Cognitive Behavioural Therapy (CBT), Acceptance and Commitment Therapy (ACT) and Compassion-Focused Therapy, tailored to what you're experiencing right now.
You don't have to work out what's happening on your own. We're here when you're ready.
About the author
Catherine Stovold is a Registered Psychologist (AHPRA PSY0002085487) with 10+ years of experience working with women through perimenopause and the mood, sleep and identity changes it can bring. Read more about Catherine here
Common Questions
How do I know if I am in perimenopause?
Common early signs include periods becoming irregular, new sleep problems, hot flushes, and mood changes such as increased anxiety or irritability. If you're in your late 30s, 40s or early 50s and noticing a combination of these, it's worth speaking to your GP.
Can perimenopause start in your 30s?
Yes. It typically begins in the mid-40s, though some women notice symptoms in their 30s. If you're experiencing symptoms earlier than expected, discuss it with your GP.
How long does perimenopause last?
On average, 4 to 6 years, though the length varies a lot between individuals. For some women it's closer to 1 year, and for others closer to a decade.
Do I need a blood test to confirm perimenopause?
Usually not. Most GPs diagnose perimenopause based on your age, symptoms and period changes. A blood test may be used if you're under 45 and the picture is unclear.
Can therapy help with perimenopause symptoms?
Therapy doesn't change your hormones. It can help with the anxiety, low mood, sleep difficulties and identity questions that often come with perimenopause, and support you in making decisions about the changes you're experiencing.
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