Why Am I Still Having Periods? Understanding Menstrual Changes in Perimenopause

I Thought My Periods Were Supposed to Stop?

One of the most confusing and frustrating parts of perimenopause is this simple question:Why am I still having periods if I’m in perimenopause?

Many women expect their periods to gradually fade away. Instead, they often become unpredictable, heavier, lighter, closer together, or seemingly random. Understanding what’s happening hormonally can ease anxiety and help you recognise what’s normal — and what isn’t.

What Happens to Your Hormones During Perimenopause?

Perimenopause is driven by hormonal fluctuation, not immediate decline.

Oestrogen Becomes Erratic

• Levels can spike very high, then drop suddenly

• This can thicken the uterine lining more than usual

Progesterone Declines Earlier

• Ovulation becomes irregular

• Less progesterone means less regulation of bleeding

This imbalance explains why bleeding patterns often change before periods stop entirely.

Common Period Changes in Perimenopause

Perimenopausal periods don’t follow one predictable pattern. Common changes include:

• Shorter cycles (e.g. every 21 days)

• Longer cycles (skipped months, then return)

• Heavier bleeding

• Lighter or spotting-only periods

• Periods that stop and start

• Clotting or flooding

You may experience several of these over time — this is normal for many women.

Why Periods Can Become Heavier

Heavy periods are common in early to mid-perimenopause because:

• High oestrogen thickens the uterine lining

• Lack of progesterone means less controlled shedding

• Fibroids (which are oestrogen-sensitive) may grow

Heavy bleeding can be exhausting and disruptive, but it’s important not to dismiss it entirely as “just hormones.”

Why Periods Can Suddenly Become Lighter or Disappear — Then Return

As ovulation becomes less frequent:

• Some cycles produce little or no lining

• Bleeding may be very light or absent

However, ovarian activity can restart, causing:

• A “surprise” heavy or normal period months later

This unpredictability is a hallmark of perimenopause.

How Long Will I Keep Having Periods?

There’s no fixed timeline.

• Some women transition over 2–3 years

• Others experience changes for 8–10 years

• Periods officially stop only after 12 consecutive months without bleeding

Until then, pregnancy is still possible.

When Is Bleeding NOT Normal?

You should seek medical advice if you experience:

• Bleeding between periods

• Bleeding after sex

• Periods lasting longer than 10 days

• Bleeding after menopause

• Severe pain with bleeding

• Symptoms of anaemia (fatigue, dizziness, breathlessness)

These may require investigation, regardless of age.

Can Contraception Affect Periods in Perimenopause?

Yes — hormonal contraception can mask or alter bleeding patterns.

• The pill may create regular withdrawal bleeds

• Hormonal IUDs often reduce or stop bleeding

• Contraception does not delay menopause, but it can hide its signs

This can make it harder to tell when menopause has occurred.

Tracking Your Periods: Why It Matters

Tracking can help you and your clinician identify patterns and red flags.

Useful details to track:

• Cycle length

• Bleeding volume

• Pain

• Clots

• Associated symptoms (sleep, mood, hot flushes)

FAQs: Periods and Perimenopause

Q1. Can I still ovulate during perimenopause?

Yes — ovulation becomes unpredictable, not impossible.

Q2. Is heavy bleeding normal in perimenopause?

It’s common, but should still be assessed if severe.

Q3. Can stress affect my cycle during perimenopause?

Yes — stress compounds hormonal fluctuation.

Q4. Can I stop periods altogether with treatment?

Some hormonal options can reduce or stop bleeding.

Q5. How do I know when my last period is my last?

You only know in hindsight, after 12 months without bleeding.

Q6. Should I still use contraception?

Yes, until menopause is confirmed.

Conclusion

Still having periods during perimenopause is not only common — it’s expected. Understanding menstrual changes helps you feel informed rather than alarmed, while also recognising when medical advice is important.