What Happens to Hormones During Perimenopause, Menopause and Postmenopause? A Complete Guide to Symptoms, Hormone Changes and Relief
- Written by Sandra Obrdalj - Certified Menopause Health Coach | Women’s Fitness Specialist
- Jun 2
- 11 min read
Menopause is often talked about like it’s one moment - your period stops, you have hot flashes, and that’s it. But in reality, menopause is a long hormonal transition that can start years before your final period and continue long after it.
For many women, the experience feels confusing because symptoms seem to come out of nowhere. One month you sleep fine, the next you’re waking at 3 a.m. drenched in sweat. You suddenly feel anxious, exhausted, forgetful, bloated, or emotionally “off” without understanding why.
The reason? Your hormones are shifting dramatically.
Understanding what happens to hormones during perimenopause, menopause, and postmenopause can make this stage feel far less overwhelming. Once you understand what your body is doing, it becomes much easier to find relief and support your health.
Summary
Perimenopause, menopause, and postmenopause are three stages of the menopause transition, each marked by major hormonal changes.
Perimenopause(1) usually begins in your 40s (sometimes late 30s) when estrogen and progesterone start fluctuating unpredictably. This can cause irregular periods, anxiety, weight gain, sleep problems, mood swings, and hot flashes.
Menopause(2) officially happens when you have gone 12 consecutive months without a period. Estrogen and progesterone drop significantly, and symptoms often peak during this stage.
Postmenopause(3) is the stage after menopause. Some symptoms improve, but lower estrogen levels can affect bone health, heart health, metabolism, skin, joints, and vaginal health long-term.
The good news: lifestyle changes, nutrition, stress management, exercise, sleep support, and hormone therapy (for some women) can significantly improve symptoms and quality of life.
Table of Contents
Why I Wanted to Write This
When perimenopause first started for me in my mid-40s, I was completely unprepared for it. Like many women, I was surprisingly uneducated about menopause and what hormonal changes could actually feel like in real life.
I expected hot flashes someday. What I did not expect was how many other parts of my life and health would slowly begin to change.
For me, it started with irregular periods. They became unpredictable, exhausting, and difficult to manage. Sometimes they were extremely heavy, other times very light, and I never knew when they would arrive. At the time, I was living and working overseas, and my work required me to always be prepared, focused, and organized. Constantly worrying about my cycle added a level of stress I hadn’t experienced before.
The strange part was that I didn’t immediately connect any of it to perimenopause.
Hot flashes eventually came, but mine were relatively mild compared to what many women experience. Nights were harder than daytime, especially when sleep started becoming more difficult. I had always been a good sleeper before, so suddenly lying awake at night felt completely foreign to me.
Then brain fog started.
That was one of the most frustrating symptoms of all. My job required me to manage large amounts of information and discuss things confidently at any moment. Meetings became mentally exhausting. I often felt like I had to work twice as hard just to stay as sharp and organized as I used to be naturally.
Another major challenge for me was joint pain.
I already live with scoliosis, so I’m used to managing daily pain in my back, neck, and hips. But during menopause, the pain became noticeably worse. What frustrated me most was that I was already doing “all the right things.” As a Pilates instructor, I exercised regularly, stayed active, and understood body mechanics well. Yet no amount of exercise seemed to fully relieve what was happening in my body.
Now that I’m in postmenopause, some of those symptoms have remained, which eventually led me to try HRT. That’s when I finally started noticing meaningful improvement. Sleep became easier, my joint pain decreased, and even weight management became less of a struggle - despite already eating well and exercising consistently.
Over the years, I experimented with many different approaches: supplements, nutrition changes, exercise adjustments, stress management, and eventually hormone therapy. It took a lot of trial and error, patience, and persistence.
What I believe now is this: there is no single solution that works for every woman, but there is help. Sometimes finding relief takes time, education, and willingness to keep trying different approaches until you discover what works for your body.
That’s one of the reasons I wanted to create this guide - because no woman should feel as confused and unprepared as I did when all of this started.
What Is Perimenopause, Menopause and Postmenopause?
These three words are often used interchangeably, but they’re actually different stages.
Perimenopause
Perimenopause means “around menopause.” This is the transition phase before menopause officially happens.
During this stage:
Your ovaries begin producing hormones less consistently
Ovulation becomes irregular
Estrogen fluctuates dramatically
Progesterone gradually declines
Perimenopause can last anywhere from 4 to 10 years.
Some women only notice mild changes. Others feel like their body suddenly stopped following the rules it used to.
Menopause
12 consecutive months without a menstrual period
The average age of menopause is 51.
At this point:
Ovaries produce far less estrogen and progesterone
Ovulation has mostly stopped
Hormone levels stabilize at a much lower level
Postmenopause
Postmenopause is the stage after menopause.
Your hormones remain lower permanently, which can affect:
Bone density
Metabolism
Skin elasticity
Vaginal tissue
Heart health
Muscle mass
Some symptoms improve after menopause, while others continue or even appear later.
Women are born with all the eggs they will ever have.
As ovarian follicles decline with age:
Ovulation becomes less reliable
Hormone production becomes irregular
Estrogen and progesterone fluctuate wildly
Think of it less like a slow downhill slope and more like a roller coaster.
One month estrogen may spike unusually high. The next month it may crash.
This unpredictability is why symptoms can feel random and intense.
Hormonal Changes During Perimenopause
Estrogen doesn’t simply decline during perimenopause. It swings up and down dramatically.
High estrogen can contribute to:
Breast tenderness
Heavy periods
Bloating
Migraines
Irritability
Low estrogen can trigger:
Hot flashes
Night sweats
Vaginal dryness
Brain fog
Fatigue
Many women are surprised that symptoms can change month to month.
Progesterone often drops before estrogen does because ovulation becomes inconsistent.
Low progesterone can lead to:
Anxiety
Poor sleep
Shorter cycles
Mood swings
PMS-like symptoms
A lot of women in their 40s suddenly feel “wired but exhausted.” This is often linked to progesterone decline combined with stress hormones.
Women produce testosterone too - just in smaller amounts than men.
Lower testosterone may affect:
Libido
Energy
Motivation
Muscle mass
Confidence
Symptoms of Hormonal Imbalance in Perimenopause
One of the hardest parts of perimenopause is that symptoms often seem unrelated.
Many women don’t realize hormones can affect nearly every body system.
Common Perimenopause Symptoms
Irregular Periods
Your cycle may become:
Shorter
Longer
Heavier
Lighter
Unpredictable
Hot Flashes and Night Sweats
These happen because estrogen affects the body’s temperature regulation system.
Anxiety and Panic Attacks
Many women experience anxiety for the first time in perimenopause.
Hormonal shifts affect:
Serotonin
GABA
Stress response systems
This is especially common during late perimenopause.
You may suddenly:
Forget words
Lose focus
Feel mentally slower
This can feel frightening, but hormonal fluctuations commonly affect cognition.
Even women who “never gained weight before” often notice:
Belly fat
Slower metabolism
Increased cravings
Falling asleep becomes harder because:
Progesterone declines
Night sweats interrupt sleep
Cortisol rises under stress
Hormonal Changes During Menopause
By menopause, hormone production has declined significantly.
Estrogen Drops Sharply
Estrogen affects far more than reproduction.
It also influences:
Brain function
Bone density
Skin
Blood vessels
Metabolism
Cholesterol
Vaginal tissue
This is why menopause symptoms can feel so widespread.
Progesterone Becomes Very Low
Without regular ovulation, progesterone production drops dramatically.
This can worsen:
Sleep issues
Anxiety
Mood instability
Follicle-Stimulating Hormone (FSH) Rises
Doctors often measure FSH* during menopause evaluation.
When estrogen declines, the brain sends stronger signals to stimulate the ovaries, causing FSH(7) levels to rise.
*FSH is a crucial chemical messenger produced by the pituitary gland in the brain. It is essential for sexual development and governs reproductive functions, including egg maturation in women.
What Happens During Postmenopause
Postmenopause is often described as the “after” stage, but hormonal changes still affect health long-term.
Some Symptoms Improve
Many women notice:
Fewer hot flashes
Better emotional stability
More predictable energy
But other changes may continue.
Lower Estrogen Affects Aging
Estrogen protects many body systems.
Lower levels may contribute to:
Osteoporosis
Dry skin
Joint pain
Vaginal atrophy
Muscle loss
Increased cardiovascular risk
This doesn’t mean decline is inevitable - but proactive health habits become more important than ever.
Estrogen: The Hormone That Changes the Most
Estrogen is often called the “master hormone” of menopause because it affects so many tissues.
What Estrogen Does
Estrogen helps regulate:
Body temperature
Skin hydration
Collagen production
Bone remodeling
Brain function
Mood
Blood sugar
Cholesterol
This explains why low estrogen symptoms can feel so varied.
Signs of Low Estrogen
Hot flashes
Night sweats
Vaginal dryness
Joint pain
Dry skin
Fatigue
Mood changes
Brain fog
Progesterone Decline and Its Effects
Progesterone is often overlooked, but many early perimenopause symptoms are linked to declining progesterone.
Progesterone Helps You Feel Calm
Progesterone supports:
Sleep
Relaxation
Nervous system balance
When it drops, many women feel:
More anxious
More reactive
More sensitive to stress
Women often describe this as:
"I suddenly don't feel like myself anymore."
That feeling is extremely common in hormonal transition years.
Testosterone Changes in Midlife Women
Testosterone isn’t just a male hormone.
Women need it for:
Muscle maintenance
Energy
Libido
Motivation
Mental drive
Lower testosterone can contribute to:
Reduced sex drive
Fatigue
Difficulty building muscle
Lower confidence
Cortisol, Insulin and Thyroid Changes During Menopause
Menopause doesn’t only involve reproductive hormones.
Other hormone systems are affected too.
Cortisol and Stress
Many women in midlife juggle:
Careers
Aging parents
Teenagers
Financial stress
Sleep deprivation
Belly fat
Sleep problems
Anxiety
Fatigue
Insulin Resistance
Declining estrogen can make the body more insulin resistant.
This may lead to:
Cravings
Higher diabetes risk
Thyroid Changes
Thyroid issues become more common in midlife women.
Symptoms can overlap with menopause:
Fatigue
Hair thinning
Weight gain
Brain fog
It’s worth discussing thyroid testing with your doctor if symptoms feel severe.
Why Weight Gain Happens During Menopause
Menopause weight gain is not simply about “eating too much.”
Several biological changes are happening at once.
Lower Estrogen Changes Fat Storage
Fat tends to shift from hips and thighs toward the abdomen.
Muscle Mass Declines
Women naturally lose muscle with age, which slows metabolism.
Sleep Problems Increase Cravings
Poor sleep affects hunger hormones like:
Ghrelin
Leptin
This can increase appetite and sugar cravings.
Stress Raises Belly Fat
Chronically elevated cortisol encourages fat storage around the midsection.
Sleep Problems and Hormones
Why Sleep Gets Worse
Common causes include:
Night sweats
Anxiety
Low progesterone
Stress
Blood sugar swings
Many women wake between 2 - 4 a.m. and struggle to fall back asleep.
That’s not “just aging.” Hormones are heavily involved.
Mood Changes, Anxiety and Brain Fog
Hormones strongly influence the brain.
Estrogen interacts with:
Serotonin
Dopamine
Stress response pathways
This is why mood symptoms can intensify during menopause transition.
Common Emotional Symptoms
Irritability
Anxiety
Feeling overwhelmed
Low motivation
Mood swings
Emotional sensitivity
Women who never struggled with anxiety before may suddenly experience it in perimenopause.
Joint Pain, Muscle Loss and Aging
Lower estrogen affects:
Inflammation
Joint lubrication
Muscle recovery
Many women wake up feeling stiff “overnight.”
Muscle Loss Accelerates
After menopause, muscle loss speeds up unless women actively maintain strength.
This matters because muscle supports:
Metabolism
Bone density
Mobility
Blood sugar regulation
Strength training becomes one of the most powerful tools for healthy aging.
Vaginal Dryness and Low Libido
This topic is often ignored, but it affects many women.
Lower estrogen can cause:
Vaginal dryness
Burning
Pain during intimacy
Recurrent UTIs
Lower testosterone and fatigue may also reduce libido.
The important thing to know:
These symptoms are common
They are treatable
You do not have to “just live with it”
Best Ways to Balance Hormones Naturally
You cannot stop menopause, but you can support your body through it.
Protein supports:
Muscle maintenance
Metabolism
Blood sugar balance
Strength Training Is Essential
Preserve muscle
Improve metabolism
Protect bones
Improve insulin sensitivity
Helpful habits include:
Cooler bedroom temperatures
Consistent bedtime
Reducing alcohol
Morning sunlight exposure
Limiting late-night scrolling
Reduce Blood Sugar Spikes
Balanced meals with:
Protein
Fiber
Healthy fats
It can help stabilize energy and cravings.
Manage Stress
Helpful options include:
Walking
Yoga
Meditation
Prayer
Deep breathing
Time outdoors
Therapy
Saying “no” more often
Sometimes the healthiest menopause strategy is simply doing less.
Hormone Replacement Therapy (HRT): Pros and Cons
For many women, HRT can significantly improve:
Hot flashes
Night sweats
Sleep
Vaginal dryness
Bone protection
Quality of life
HRT Is Not One-Size-Fits-All
Some women are excellent candidates. Others may not be.
Decisions depend on:
Age
Medical history
Symptom severity
Personal risk factors
This is an important conversation to have with a knowledgeable healthcare provider.
When to Talk to Your Doctor
See a healthcare provider if you experience:
Heavy bleeding
Bleeding after menopause
Severe depression or anxiety
Debilitating hot flashes
Extreme fatigue
Rapid heart palpitations
Significant sleep disruption
You deserve support. Menopause should not be dismissed as something you simply “have to suffer through.”
Final Thoughts
Hormonal changes during perimenopause, menopause, and postmenopause affect far more than periods and hot flashes.
They can influence:
Mood
Sleep
Weight
Memory
Skin
Joints
Energy
Metabolism
Confidence
For many women, the hardest part is not knowing why they suddenly feel different.
But understanding these hormonal shifts can be incredibly empowering.
This stage is not the end of vitality or femininity. In many ways, it’s the beginning of learning how to care for your body in a deeper, more intentional way.
And with the right support, many women feel stronger, calmer, and more confident on the other side of menopause than they ever expected.
FAQ
At what age do hormone changes begin?
Perimenopause often starts between ages 40 - 45, though some women notice symptoms in their late 30s.
Which hormone drops first in perimenopause?
Progesterone typically declines first because ovulation becomes less consistent.
How long do menopause symptoms last?
Some women experience symptoms for a few years, while others continue having hot flashes or sleep issues for a decade or longer.
Can menopause cause anxiety?
Yes. Hormonal fluctuations can affect neurotransmitters involved in mood and stress regulation.
Why do women gain belly fat during menopause?
Lower estrogen, muscle loss, insulin resistance, stress, and sleep problems all contribute to abdominal weight gain.
Can hormones affect joint pain?
Yes. Lower estrogen levels may increase inflammation and reduce joint lubrication.
Is postmenopause easier than perimenopause?
For many women, yes. Hormones become more stable after menopause, so emotional and physical symptoms may improve.
What helps balance hormones naturally?
Strength training, protein intake, stress management, quality sleep, blood sugar balance, and regular movement can all help.
People Also Ask
What are the first signs of perimenopause?
Irregular periods, sleep issues, anxiety, mood swings, hot flashes, and unexplained weight gain are common early signs.
What hormones change the most during menopause?
Estrogen and progesterone change the most, though testosterone, cortisol, and insulin are also affected.
Can menopause symptoms happen even with regular periods?
Yes. Many women experience symptoms years before periods become irregular.
Why do I suddenly feel anxious in my 40s?
Hormonal fluctuations during perimenopause can affect the brain’s stress and mood regulation systems.
Does menopause slow metabolism?
Yes. Hormonal changes, muscle loss, and aging can all contribute to a slower metabolism.
Can menopause cause insomnia?
Absolutely. Hormonal changes, night sweats, anxiety, and cortisol disruptions commonly affect sleep.
References
About the Author
Sandra is a Certified Menopause Health Coach, Certified Barre® Instructor and Pilates Instructor, who helps women stay strong, active, and healthy through perimenopause and menopause.
Drawing on both professional knowledge and personal experience with menopause, she shares practical strategies for exercise, nutrition, and lifestyle habits to help women improve sleep, preserve muscle, and support mental clarity during hormonal transition.
She writes to provide clear and grounded menopause education rooted in strength - not extremes.
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