Menstruation in perimenopause

In short: In your 40s, falling and swinging hormone levels can make periods irregular, heavier or lighter, and closer together or further apart. This stage is called perimenopause, and it ends with menopause, when you have gone 12 months in a row without a period. Many of these changes are normal. See a gynaecologist if you soak a pad every hour for several hours, bleed for more than 7 days, bleed between periods or after sex, or have very painful periods.

Your 40s can feel like a strange in-between stage. You are not quite menopausal, but your body’s not working the same way it did in your 20s or 30s either. One of the biggest clues? Your period.

If you have been wondering, “Why is my cycle suddenly acting so weird?” you are not alone. Welcome to perimenopause, the transitional phase leading up to menopause. And yes, your period is trying to tell you something.

What is perimenopause?

Perimenopause typically begins in your mid to late 40s, though it can start earlier for some. It is the natural hormonal shift that occurs as your ovaries gradually produce less estrogen and progesterone, the hormones that regulate your menstrual cycle.

This phase can last anywhere from a few years to over a decade, ending when you officially hit menopause, marked by 12 consecutive months without a period.

How your period changes during perimenopause

Your cycle becomes irregular

You may notice your once-predictable cycle is now a mystery. Some months it comes early, others it skips entirely. This happens because ovulation becomes less consistent.

What it means: Your ovaries are winding down their hormone production, causing erratic periods.

Heavier (or lighter) bleeding

Periods might suddenly feel like a flood, or barely show up at all. Heavy bleeding, longer cycles, or passing clots are common in early perimenopause, while lighter or shorter periods often appear in the later stages.

What it means: Estrogen levels spike and drop erratically, and your uterine lining may build up more than usual before shedding.

Shorter or longer gaps between periods

You might get a period every 21 days for a while, then go 60 days without one.

What it means: Your hormonal balance is shifting, and ovulation may not happen every cycle.

Period symptoms feel more intense

Mood swings, cramps, breast tenderness, migraines, and fatigue can all ramp up.

What it means: Your body is more sensitive to fluctuating hormones, and progesterone, which has a calming effect, may be in short supply.

Is this normal, or should you see a doctor?

While many changes are normal during perimenopause, certain symptoms should not be ignored, including:

• Soaking through a pad or tampon every hour for several hours
• Periods lasting more than 7 days consistently
• Bleeding between periods or after sex
• Unusually painful periods

These could signal fibroids, endometrial hyperplasia, or other underlying issues, so always check in with your doctor. If you are soaking a pad every hour and feel dizzy or faint, go to hospital straight away.

Why tracking your period still matters in your 40s

Even if it feels unpredictable, tracking your cycle is incredibly helpful during perimenopause. Use an app or journal to log:

• When your period starts and ends
• Flow intensity
• Physical and emotional symptoms

This helps you notice patterns, understand your hormonal shifts, and prepare for menopause with more awareness and control.

How to support your body during this transition

Here are some simple tips for navigating perimenopause with grace:

Focus on Nutrition

• Eat foods rich in calcium, magnesium, and healthy fats
• Increase phytoestrogens (like flaxseeds, soy, and sesame)
• Limit caffeine, alcohol, and processed sugar

Reduce stress

Chronic stress worsens hormonal imbalance. Try yoga, meditation, walking, or deep breathing to help regulate your cortisol levels.

Prioritize sleep

Hormonal fluctuations can disturb your sleep. Create a calm bedtime routine and aim for 7–8 hours per night.

Move your body

Exercise improves mood, metabolism, and bone health. Even 20–30 minutes of daily movement can work wonders.

What your period is trying to tell you

Your period during perimenopause is like a monthly progress report from your hormones. It is telling you:

• That your body is transitioning
• It is time to pay closer attention to your health
• That you are entering a new phase of life, not an end, but a transformation

And while the changes can be frustrating or confusing, they are also completely natural. You are not broken. You are evolving.

Perimenopause can feel like puberty in reverse, only this time, you are wiser, more in tune with your body, and better equipped to handle the shifts. By understanding what is happening with your period, you can ride the waves of hormonal change with more clarity and confidence.

Do not be afraid to talk about it, track it, or ask for help. This is your body’s way of preparing you for a new chapter, and you deserve to feel empowered every step of the way.

Questions women ask

Why are my periods irregular in my 40s?

As you near menopause, your ovaries make less oestrogen and progesterone, and you may not ovulate every month. So periods can come early, come late or skip a month. This phase is called perimenopause and can last a few years or longer.

Is heavy bleeding normal in perimenopause?

Heavier periods and clots are common in early perimenopause, because oestrogen can spike and the lining of the uterus builds up more. But very heavy bleeding is not something to put up with. See a gynaecologist, as it can be caused by fibroids or a thickened lining.

When should I worry about bleeding in perimenopause?

See a doctor if you soak through a pad every hour for several hours, have periods lasting more than 7 days, bleed between periods or after sex, or have unusually painful periods. Go the same day if heavy bleeding makes you dizzy, faint or breathless.

How long does perimenopause last?

It usually begins in the mid to late 40s, though it can start earlier. It can last from a few years to over ten years. It ends at menopause, which is confirmed once you have had no period for 12 months in a row.

Should I still track my periods in perimenopause?

Yes. Note when each period starts and ends, how heavy it is, and any symptoms like mood changes or cramps. This helps you spot patterns and gives your doctor useful information if something changes.