Understanding Perimenopause: Signs, Stages & Support

You’re waking at 3am, your periods have become unpredictable, and the patience you once had seems harder to find. Perhaps you’re forgetting words in meetings or suddenly feeling uncomfortable during sex. You might blame stress, ageing or an overloaded schedule.

Perimenopause could be part of the explanation.

This transition can affect far more than your menstrual cycle. Understanding it helps you recognise changes and seek care, while avoiding the assumption that every new symptom must be hormonal.

What is perimenopause?

Perimenopause is the transition around the end of your reproductive years, when ovarian hormone production becomes less predictable and ovulation happens less consistently.

Oestrogen does not simply decline in a straight line. Levels can fluctuate considerably, while changes in ovulation also affect progesterone production. This helps explain why symptoms may come and go.

The transition commonly begins in the 40s, although timing varies. It can last several years.

Menopause refers to your final menstrual period, confirmed retrospectively after 12 consecutive months without a period, provided another condition or treatment does not explain the absence. Hormonal contraception can make this harder to establish.

Postmenopause is the phase that follows. Symptoms do not necessarily disappear when that milestone is reached.

Understanding the stages

Clinicians commonly distinguish between the early and late menopausal transition using menstrual patterns.

Early transition: Your previously predictable cycle becomes more variable. The recognised staging framework uses a persistent difference of at least seven days between consecutive cycle lengths. Periods may initially become closer together.

Late transition: Longer gaps develop, including intervals of at least 60 days without a period. Ovulation becomes increasingly unpredictable, and hot flushes or night sweats may become more noticeable.

The final menstrual period: You cannot know immediately that a particular period was your last. That becomes clear only after the following 12 months.

These stages describe reproductive changes, rather than a fixed timetable of symptoms. Someone in early transition may struggle considerably, while someone approaching menopause may have relatively few difficulties.

The signs extend beyond changing periods

A change in your usual bleeding pattern is an important clue. Periods may become shorter, longer, heavier, lighter or less predictable.

Other common symptoms include:

• Hot flushes and night sweats: Sudden waves of heat, sometimes accompanied by sweating, chills or a noticeable heartbeat.
• Sleep disruption: Difficulty falling asleep, repeated waking or waking earlier than intended.
• Mood changes: Irritability, anxiety, low mood or feeling less able to cope.
• Brain fog: Trouble concentrating, recalling words or remembering everyday details.
• Vaginal and urinary symptoms: Dryness, irritation, painful sex, urgency or recurrent urinary infections.
• Other changes: Reduced sexual desire, joint aches and changes in headache or migraine patterns.

You do not need to experience every symptom. Some women notice mainly menstrual changes; others find sleep or emotional symptoms more disruptive.

The impact matters as much as the symptom list. Repeatedly losing sleep or struggling at work warrants attention.

Brain fog and mood changes deserve attention

Losing your train of thought can feel unsettling, particularly when your work depends on concentration. Cognitive complaints are common during the menopause transition and are usually mild. Brain fog alone does not establish that someone has dementia.

Sleep disruption can compound concentration difficulties, while hormonal changes may increase vulnerability to depression, especially in women with a previous history.

However, persistent depression, severe anxiety or worsening cognitive difficulties need their own assessment. Hormones may contribute without explaining everything.

Describe what has changed, how often it happens and how it affects daily life. “I’m struggling to finish tasks and waking four times every night” gives your clinician useful information.

Do you need blood tests?

Often, diagnosis begins with your age, symptoms and menstrual history.

NICE guidance recommends identifying perimenopause without laboratory testing in otherwise healthy people aged 45 or older who have newly developed hot flushes or night sweats alongside menstrual changes.

A single hormone result can be misleading because levels fluctuate. A “normal” reading does not necessarily exclude the transition.

Testing may be appropriate between 40 and 45, or when symptoms suggest premature ovarian insufficiency before 40. Other investigations may assess alternative explanations, such as thyroid disease or anaemia.

Your clinician should explain what each proposed test will clarify. An expensive hormone panel is not automatically more informative than a careful consultation.

Hormone therapy can help before periods stop

You do not have to wait until menopause to discuss treatment.

Menopausal hormone therapy, often called HRT, is the most effective treatment for troublesome hot flushes and night sweats. It can also improve sleep when symptoms are causing repeated waking.

Systemic oestrogen is available in forms including tablets, patches and gels. If you still have a uterus, a progestogen is generally needed alongside systemic oestrogen to protect its lining.

Treatment should reflect your symptoms, medical history and preferences. A history of hormone-sensitive cancer, blood clots, cardiovascular disease, liver disease or unexplained bleeding can affect suitability and may require specialist advice.

Benefits and risks also vary by formulation and duration. Oral oestrogen carries a higher clot risk than oestrogen delivered through the skin.

Ask what improvement to expect, which side effects to watch for and when treatment will be reviewed.

Other treatment options are available

For vaginal dryness, moisturisers provide ongoing relief, while lubricants reduce friction during sex. Low-dose vaginal oestrogen may help persistent vaginal and urinary symptoms and has much lower systemic absorption than systemic hormone therapy.

Menopause-specific cognitive behavioural therapy can help manage the distress associated with hot flushes, sleep difficulties and certain mood symptoms.

Prescription non-hormonal medicines can also help selected patients. Their suitability depends on symptoms, other medication and availability.

Herbal products marketed for menopause have inconsistent evidence, and some interact with medicines. Custom-compounded hormones have not been shown to be safer or more effective than approved products. Discuss what you are taking before adding another supplement or treatment.

Daily habits provide useful support

Regular movement supports bone, muscle and cardiovascular health. Include resistance exercise and weight-bearing activity such as walking.

Eat a varied diet with adequate protein and calcium-rich foods. Keep a consistent sleep routine and make the bedroom comfortable.

Alcohol, caffeine or spicy foods may aggravate symptoms for some people. Track your own response rather than imposing unnecessary restrictions.

These habits support health, but persistent symptoms may still need treatment.

Pregnancy remains possible

Irregular periods do not mean ovulation has stopped completely. HRT is not contraception.

Discuss contraception alongside symptom treatment. Some hormonal contraceptives can address both needs, depending on your age and health history.

Certain methods also alter bleeding, making menstrual patterns less useful for identifying menopause. Get individual advice before stopping contraception.

Know when to seek help

Arrange assessment for very heavy or prolonged bleeding, bleeding between periods or after sex, or any bleeding after 12 months without periods. Seek urgent care if heavy bleeding causes faintness, severe weakness or breathlessness.

In South Africa, start with your GP or local primary healthcare clinic. Bring a record of periods, symptoms and medication.

Leave with a clear plan covering treatment, contraception, any necessary investigations and follow-up. Perimenopause may be a natural transition, but support can make a meaningful difference to daily life.