What Is Perimenopause?
If your periods have become unpredictable, your sleep is suddenly broken, and your moods swing for no clear reason, you may be wondering what is happening to your body. The answer is often perimenopause. But you might be asking yourself, What is perimenopause? It's a fair question, and one that most of us didn't know we needed to ask (me included).
The truth is, perimenopause is a normal, natural stage of life, yet it is frequently misunderstood, misdiagnosed, or brushed aside.
This guide breaks it all down: what perimenopause is, what causes it, the first signs, what age it starts, how long it lasts, how doctors diagnose it, and the symptoms to watch for. You'll also learn practical ways to feel more like yourself again. Not sure if this is you? You can take our quick perimenopause quiz to check your symptoms.
TL;DR: What Is Perimenopause?
- Perimenopause is the transition before menopause, when your ovaries slowly make less estrogen and progesterone.
- It usually starts in your mid-40s, though it can begin in your late 30s or early 50s.
- It lasts about four years on average, but it can range from a few months to a decade.
- The first sign is usually a change in your periods, followed by symptoms like hot flashes and mood swings.
- There is no single test. Doctors diagnose it mainly from your symptoms and menstrual changes.
- Menopause is different. You reach it after 12 months with no period, at an average age of 51 to 52.
- You have options. Lifestyle changes, support, hormone therapy, and natural supplements can all help.
What Causes Perimenopause?
Perimenopause is caused by the natural slowdown of your ovaries as you age. As you move through your late 30s and 40s, your ovaries make less estrogen and progesterone. These are the two main hormones that control your menstrual cycle.
As these hormone levels fall, they also rise and dip unevenly from month to month. This up-and-down pattern is what drives irregular periods and many other symptoms. Your genetics, lifestyle, and medical history all affect when it starts and how strong your symptoms feel.
It helps to know that these hormones do far more than control your period. Menopause specialist Dr Louise Newson points out that these hormones "are made in our brains as well," which is why perimenopause can affect your mood, memory, and sleep, not just your cycle. This connection runs through your endocannabinoid system, the body's system for maintaining balance in mood, sleep, and stress.
What Are the First Signs of Perimenopause?
For most women, the first sign is a change in their periods. Your cycle might get shorter, longer, heavier, or lighter than usual, or start skipping months. Because these shifts can be subtle, they are easy to blame on stress or a busy life.
Other early signs often show up around the same time. Many women notice trouble sleeping, new or stronger mood swings, hot flashes, or brain fog before they connect the dots to their hormones. This is why perimenopause is so often missed or misdiagnosed. If several of these signs are showing up together, it may be worth becoming your own health advocate, arming yourself with knowledge, and talking to your doctor.
What Age Does Perimenopause Start?
Perimenopause typically starts in a woman's mid- to late 40s. Still, every woman is different. Some notice changes as early as their mid-30s, while others do not feel them until their early 50s.
Certain factors can cause perimenopause to start earlier:
- Family history. If your mother went through it early, you may too.
- Smoking. Smoking is linked to menopause starting one to two years earlier.
- Cancer treatments. Chemotherapy and radiation can affect how your ovaries work.
- Certain surgeries or conditions. Removing the ovaries, autoimmune conditions, and other medical conditions can bring it on sooner.
If your symptoms start before age 40, talk to your doctor, since this is earlier than average and can have other causes.
How Long Does Perimenopause Last?
On average, perimenopause lasts about four years. But the range is wide: some women pass through it in just a few months, while for others it lasts eight years or more.
Doctors sometimes split it into two stages. Early perimenopause is when your cycles first become irregular. Late perimenopause is when gaps between periods grow longer and symptoms often peak. You will know perimenopause has ended when you have gone a full 12 months in a row without a period. At that point, you have reached menopause.
Pre-Perimenopause vs. Perimenopause vs. Menopause: What's the Difference?
People often use these words interchangeably, but they mark three different stages. Here is a simple side-by-side look at how your body moves through them:
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Pre-perimenopause is the calm before the change, perimenopause is the journey, and menopause is the destination.
What Are the Symptoms of Perimenopause?
Symptoms vary widely from woman to woman. You may get only a few, and they may change over time. Some of the most common ones surprise people.
As Dr Newson explains, the most common symptoms are often those affecting the brain: "brain fog, memory problems, low mood, anxiety, irritability, poor sleep, fatigue." Here are the main signs to watch for.
Irregular Periods
Your cycle may get shorter or longer, and periods may become heavier or lighter. This is often the very first sign.
Hot Flashes
A sudden feeling of intense heat, often with sweating and skin flushing. Learn more about the link between cortisol and these symptoms.
Night Sweats
Hot flashes during sleep. They can soak your bedding and wake you up, leaving you drained the next day.
Mood Swings and Anxiety
Shifting estrogen can trigger mood swings, irritability, and anxiety. Our Relax stress support was made to help ease these moments.
Brain Fog
Trouble with memory, focus, and clear thinking. This is a real, common symptom, not a personal failing.
Sleep Disturbances
Trouble falling or staying asleep, often from night sweats or shifting hormones. See our guide to natural remedies for perimenopause sleep problems.
Changes in Libido and Vaginal Dryness
Falling estrogen can lower sexual desire and cause vaginal dryness, itching, or discomfort during sex.
Other Symptoms
Some women also notice weight changes, joint aches, headaches or migraines, and heart palpitations. Because symptoms overlap with other conditions, they are often missed or misdiagnosed.
How Is Perimenopause Diagnosed?
There is no single test that confirms perimenopause. Doctors diagnose it mainly from your symptoms and changes in your menstrual cycle, not from one lab result.
This is because your hormone levels rise and fall so much during this phase that a single blood test can be misleading. Your doctor may still check hormone levels in some cases, especially if your periods stop before age 40, to rule out other causes. The most useful thing you can do is track your cycles and symptoms and share that record with your provider. Perimenopause is best identified through this ongoing pattern rather than a one-time test.
Can You Still Get Pregnant During Perimenopause?
Yes. This is one of the biggest misunderstandings about this stage. As long as you are still having periods, even irregular ones, you are still ovulating at least some of the time, which means pregnancy is still possible.
If you don't want to become pregnant, keep using birth control until your doctor confirms you have reached menopause, meaning a full 12 months with no period. If you are hoping to conceive, know that fertility does decline during perimenopause, so it is worth speaking with your provider about your options.
How to Manage Perimenopause Symptoms
- Perimenopause can be disruptive, but you are not powerless. These strategies can help you feel better.
- Stay informed. Understanding what is happening in your body is the first step to feeling in control.
- Prioritize self-care. Regular exercise, healthy eating, stress management, and good sleep habits all support your body and mind.
- Seek support. Connect with friends, family, or support groups. Hearing from others going through the same thing makes a real difference.
- Consider hormone therapy. Hormone replacement therapy (HRT) can ease more severe symptoms. Talk through the risks and benefits with your provider.
- Explore natural options. Some women find relief through acupuncture, herbal remedies, or supplements. Our perimenopause supplements are made by women, for women, using cannabinoid science to help ease anxiety, mood swings, poor sleep, and inflammation. For sleep specifically, Rest was formulated to help you fall asleep and stay asleep.
- Talk to your doctor. Regular check-ups help monitor your health and rule out other conditions that mimic perimenopause.
Medical Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider about your personal health, symptoms, and treatment options.
