Am I in Perimenopause? 10 Early Signs Women Often Miss

Perimenopause or PCOS/PMOS? Why These Hormonal Conditions Can Look Surprisingly Similar.

Irregular periods. Acne. Weight changes. Hair changes. Mood swings. When your hormones start behaving differently, how do you know what’s actually going on?

You thought you understood your cycle. Then suddenly your period starts arriving whenever it feels like it. Your skin is breaking out again. Your sleep isn't what it used to be. Your weight feels different, your mood is unpredictable, and you're wondering what changed.

If you're somewhere in your late 30s or 40s, you might immediately think: Is this perimenopause?

But many of these symptoms can also occur with PCOS/PMOS (Polyendocrine Metabolic Ovarian Syndrome, formerly Polycystic Ovary Syndrome).

And that's where things can get confusing.

Both conditions can affect your menstrual cycle, skin, hair, metabolism, mood and fertility. But they happen for very different reasons, and understanding those differences matters when it comes to getting the right support.

Let's break it down.

First, What Is Perimenopause?

Perimenopause is the transition leading up to menopause.

During this time, ovarian function begins to change and levels of hormones such as estrogen and progesterone become increasingly variable. Ovulation can become less predictable, which is why your menstrual cycle may suddenly start behaving differently.

Perimenopause commonly begins during the 40s, although some women experience changes earlier.

Menopause itself is reached once you have gone 12 consecutive months without a menstrual period, provided there isn't another reason for your periods to have stopped.

During perimenopause, symptoms can include:

• Changes in cycle length or flow

• Hot flushes

• Night sweats

• Sleep disturbances

• Mood changes

• Vaginal dryness

• Reduced libido

• Brain fog or concentration difficulties

• Joint and muscle discomfort

For otherwise healthy women aged 45 and older who develop typical symptoms alongside changes in their menstrual cycle, international guidance generally recommends diagnosing perimenopause based on symptoms rather than routinely relying on hormone blood tests. This is because hormone levels can fluctuate significantly during the transition.

And What Is PCOS/PMOS?

PCOS was officially renamed Polyendocrine Metabolic Ovarian Syndrome (PMOS) in 2026 to better reflect the whole-body nature of the condition.

We'll refer to it as PCOS/PMOS while the new terminology becomes more widely recognised.

Unlike perimenopause, PCOS/PMOS isn't a temporary hormonal transition. It's a chronic endocrine, metabolic and reproductive condition that can affect women throughout their reproductive years and beyond.

It is commonly associated with:

• Irregular or absent ovulation

• Irregular menstrual cycles

• Elevated androgen levels

• Acne

• Excess facial or body hair

• Scalp hair thinning

• Fertility difficulties

• Insulin resistance and metabolic concerns in many women

And despite the old name, you don't necessarily need to have "polycystic ovaries" to have PCOS/PMOS.

Current international guidelines define irregular cycles more than three years after the first period and before perimenopause as cycles shorter than 21 days, longer than 35 days, or fewer than eight cycles per year. Irregular cycles should prompt consideration and appropriate assessment for PCOS/PMOS.

So Why Can They Look So Similar?

Here's where things get interesting.

Both PCOS/PMOS and perimenopause can disrupt ovulation and change your hormone patterns.

That means they can produce several overlapping symptoms.

1. Your Periods Become Irregular

Irregular periods are one of the hallmark signs of PCOS/PMOS, but they're also one of the most recognisable changes during perimenopause.

With PCOS/PMOS, irregular periods are often linked to chronic ovulatory dysfunction. If ovulation isn't occurring regularly, your cycle may become longer, unpredictable or absent.

During perimenopause, declining ovarian function means ovulation becomes less consistent. Cycles may become shorter, longer, heavier, lighter or occasionally disappear before returning again.

The important clue is often your history.

If your cycles have been irregular since your teens or 20s and you've also experienced symptoms such as acne, excess facial hair or fertility difficulties, PCOS/PMOS may warrant investigation.

If your cycles were historically predictable and have suddenly started changing as you approach your 40s or 50s, perimenopause becomes more likely.

That's not a diagnostic rule, though, which is why your healthcare professional should look at the bigger picture.

2. Hello, Hormonal Acne

You thought you'd left breakouts behind with your teenage years. Then your jawline had other plans.

Acne can occur with both conditions, but the hormonal drivers aren't necessarily the same.

With PCOS/PMOS, elevated androgen activity can increase sebum production and contribute to persistent acne.

During perimenopause, changing estrogen levels can alter the relative balance between estrogen and androgens. Some women consequently notice changes in oil production, skin sensitivity and breakouts.

So if acne suddenly appears in your late 30s or 40s, don't automatically assume it's PCOS/PMOS.

Look at what else has changed too.

3. Your Hair Starts Changing

Hair can be another confusing crossover.

PCOS/PMOS is strongly associated with hyperandrogenism, which can contribute to excess facial or body hair as well as androgen-related scalp hair thinning.

Hair thinning can also become more noticeable during and after the menopause transition as hormonal changes affect the hair growth cycle.

However, sudden or significant hair loss shouldn't automatically be blamed on hormones. Thyroid dysfunction, iron deficiency, nutritional deficiencies, medications, stress and other conditions can also contribute.

If you're noticing substantial changes, investigating the underlying cause is much more useful than simply reaching for a hair supplement.

4. Your Body Composition Starts Changing

This can be one of the most frustrating symptoms because women often feel as though they're doing exactly what they've always done, but their body is responding differently.

PCOS/PMOS has important metabolic features. Insulin resistance is common, although it does not affect every woman with the condition and PCOS/PMOS can occur at any body size.

During the menopause transition, changes in reproductive hormones, ageing, physical activity, sleep and muscle mass can also influence body composition and metabolic health.

So weight gain alone cannot tell you which condition you're dealing with.

More importantly, neither condition should be reduced to a conversation about weight.

Your blood glucose, blood pressure, cholesterol, waist circumference, sleep, nutrition, activity levels and family history can all provide valuable information about your broader metabolic health.

5. Mood, Sleep and Energy Can Change Too

Anxiety. Irritability. Poor sleep. Low energy. Brain fog.

These symptoms are commonly discussed during perimenopause, but women living with PCOS/PMOS also experience an increased burden of psychological and sleep-related concerns.

During perimenopause, hormonal fluctuations may contribute to mood changes, while night sweats and other symptoms can make quality sleep harder to achieve.

With PCOS/PMOS, the relationship is complex. Hormonal and metabolic factors, sleep disorders and the psychological impact of living with symptoms such as infertility, acne, hirsutism and weight stigma can all play a role.

Persistent anxiety, depression or severe mood changes deserve proper healthcare support rather than simply being dismissed as "hormones."

Can You Have PCOS/PMOS AND Be in Perimenopause?

Yes.

PCOS/PMOS doesn't simply disappear when you reach your 40s.

Research looking at women with PCOS/PMOS during and after the menopause transition suggests that some features can change with age. Menstrual patterns may change, but androgen and metabolic differences can persist.

A 2023 systematic review and meta-analysis found that peri- and postmenopausal women with PCOS had higher androgen concentrations and several metabolic risk markers compared with women without PCOS, although the researchers stressed that the available evidence was heterogeneous and often of low certainty.

In other words, reaching perimenopause doesn't necessarily mean you've "grown out" of PCOS/PMOS.

Instead, your existing hormonal and metabolic picture may now be interacting with an entirely new hormonal transition.

And yes, that can make understanding your symptoms a little more complicated.

How Do You Actually Tell the Difference?

There isn't a symptom checklist that can definitively tell you.

Your healthcare professional may consider factors such as:

1. Your menstrual history: Have your periods always been irregular, or is this new?

2. Your age: Perimenopause becomes increasingly likely as you approach the typical menopause years.

3. Androgen symptoms: Long-standing hirsutism, persistent acne and androgen-related hair loss may point towards PCOS/PMOS.

4. Hot flushes and night sweats: New vasomotor symptoms alongside changing periods are characteristic of the menopause transition.

5. Your medical history: Fertility difficulties, previous PCOS/PMOS diagnosis, metabolic health and family history can provide important clues.

And don't assume you need a huge hormone-testing panel to "prove" perimenopause.

NICE guidance states that in otherwise healthy people aged 45 and over with typical menopause-associated symptoms, perimenopause can usually be identified clinically without laboratory testing. Hormones such as FSH fluctuate during this stage, so a single result may not give you the definitive answer you expect.

Testing may be appropriate in younger women, when symptoms are atypical, or when another condition needs to be investigated.

Supporting Your Hormones Through Either Journey

Whether you're navigating PCOS/PMOS, perimenopause or potentially both, there are some foundations that support overall metabolic and hormonal health.

Keep blood sugar steady

Building meals around protein, fibre, healthy fats and minimally processed carbohydrates can help support stable blood glucose and overall metabolic health.

This can be particularly relevant for PCOS/PMOS, where metabolic risk and insulin resistance require consideration.

Prioritise movement

Resistance training, walking and cardiovascular exercise can support insulin sensitivity, cardiovascular health, muscle mass, bone health and mental wellbeing.

The goal isn't to punish your body into changing. Exercising can help support it through the hormonal changes it's experiencing.

Protect your sleep

Consistent sleep routines, limiting caffeine later in the day and addressing disruptive symptoms such as night sweats can make a meaningful difference to how you feel.

Choose supplements based on what you actually need

This is where understanding the cause of your symptoms matters.

For women with PCOS/PMOS, Jooce's Hormone Balance Powder and Pure Inositol Powder contain ingredients selected to support areas including metabolic and reproductive health.

For women navigating perimenopause and menopause, MenoBalance has been formulated specifically with this life stage in mind.

Magnesium Glycinate can also provide nutritional magnesium support and may fit into a broader wellness routine depending on your individual needs.

Supplements aren't a diagnosis or a replacement for medical treatment. If you're unsure whether you're dealing with PCOS/PMOS, perimenopause or another hormonal condition, start with finding out what's actually happening.

The Jooce Takeaway

Same symptoms. Different hormonal story.

Irregular periods, acne, hair changes, mood changes and shifts in your metabolism can occur with both PCOS/PMOS and perimenopause. But that doesn't make the two conditions interchangeable.

One is a chronic endocrine-metabolic condition. The other is a natural reproductive transition.

And sometimes, you're navigating both.

Rather than trying to diagnose yourself from one symptom, pay attention to patterns. Think about what's new, what you've experienced for years, and how your cycle and symptoms have changed over time.

Your symptoms can provide clues. The goal is knowing how to put those clues together.

References

Millán-de-Meer, M., Luque-Ramírez, M., Nattero-Chávez, L. and Escobar-Morreale, H.F. (2023) ‘PCOS during the menopausal transition and after menopause: a systematic review and meta-analysis’, Human Reproduction Update, 29(6), pp. 741–772. doi:10.1093/humupd/dmad015.

Monash University (2026) International Evidence-based Guideline for the Assessment and Management of Polyendocrine Metabolic Ovarian Syndrome (PMOS). Available at: https://www.monash.edu/medicine/mchri/pcos/guideline (Accessed: 4 September 2026).

National Institute for Health and Care Excellence (NICE) (2024) Menopause: identification and management (NG23). Available at: https://www.nice.org.uk/guidance/ng23 (Accessed: 4 September 2026).

Teede, H.J., Tay, C.T., Laven, J.J.E., Dokras, A., Moran, L.J., Piltonen, T.T., Costello, M.F., Boivin, J., Redman, L.M., Boyle, J.A., Norman, R.J., Mousa, A. and Joham, A.E. (2023) ‘Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome’, Human Reproduction, 38(9), pp. 1655–1679. doi:10.1093/humrep/dead156.

Mousa, A., Tay, C.T. and Teede, H.J. (2023) Technical Report for the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome: 2023 Update. Monash University. doi:10.26180/23625288.v1.