The Truth About Women’s Hormones: What I Wish More Women Knew as an OB/GYN Nurse Practitioner
Let me tell you about the conversation I have almost every single day in my practice.
A woman walks in. She’s exhausted. Her sleep is off. She’s gained weight without changing anything. Her mood swings are wild enough to confuse everyone in her household, including herself. She’s been telling her doctor something feels wrong for months, maybe years, and she keeps leaving appointments with the same answer:
She doesn’t feel normal.
And honestly? After five years working in OB/GYN as a nurse practitioner, I can tell you that understanding your women’s hormones is often the missing piece in that conversation.”
That’s what I want to fix today.
This is the conversation I try to have with every woman who sits across from me in the exam room. Consider this your primer on female hormones ~ what they are, what they do, why they go sideways, and what it means for your health, your energy, your body, and your life.
Table of Contents
What Are Women’s Hormones, Actually?
Hormones are chemical messengers. They’re produced by glands throughout your body, travel through your bloodstream, and tell your cells, tissues, and organs what to do.
They control almost everything: your metabolism, your mood, your reproductive cycle, your sleep, your bone density, your muscle mass, your stress response, your libido, and your body composition.. and so on!
When your hormones are working well, you feel it. Energy is consistent. Sleep is restorative. Weight is manageable. Your mood is even. You feel like yourself.
When they’re not working well, you also feel that. And the symptoms can be so varied, so easy to dismiss as “just stress” or “just part of getting older,” that many women go years without connecting the dots.
The major hormones that most affect women’s health and well-being:
Estrogen is probably the one you’ve heard the most about. Produced primarily in the ovaries, estrogen drives puberty, regulates your menstrual cycle, protects bone density, supports cardiovascular health, influences mood through serotonin pathways, and affects skin, hair, and body composition. It’s not just one hormone… estrogen is actually a family of hormones, with estradiol being the most potent and most active during your reproductive years.
Progesterone works in balance with estrogen. It’s produced after ovulation and is responsible for preparing the uterine lining for a potential pregnancy, supporting sleep, calming the nervous system, and counterbalancing estrogen’s stimulating effects. When progesterone is low relative to estrogen, a condition called estrogen dominance, the result is often heavy periods, mood swings, anxiety, bloating, and breast tenderness.
Testosterone is not just a male hormone. Women produce testosterone too, in both the ovaries and adrenal glands. It supports our libido, muscle mass, bone density, energy, and yes, even our motivation. Low testosterone in women often presents as fatigue, low sex drive, difficulty building muscle, and brain fog. Many women are never tested for it.
Cortisol is your primary stress hormone, produced by the adrenal glands. In short bursts, cortisol is life-saving, as it fuels your fight-or-flight response. In chronic activation, which is where most modern mothers live (IYKYK), it suppresses sex hormone production, disrupts thyroid function, promotes fat storage (particularly around the midsection), degrades sleep quality, and keeps your nervous system in a constant state of low-grade emergency.
Thyroid hormones (T3 and T4) are produced by the thyroid gland and regulate your metabolism. Hypothyroidism, or an under-active thyroid, is more common in women than men and presents as fatigue, weight gain, cold intolerance, hair loss, constipation, depression, and difficulty concentrating. A single TSH test doesn’t always tell the complete story.
Insulin is a hormone produced by the pancreas that regulates blood sugar. Insulin resistance, where cells stop responding effectively to insulin, is increasingly common in women and drives fatigue, weight gain (especially around the midsection), sugar cravings, brain fog, and is closely linked to polycystic ovary syndrome (PCOS) and the hormonal disruption of perimenopause (Prosperi & Chiarelli, 2025).
How Women’s Hormones Shift Throughout Your Life
Here’s something I wish every woman could understand: your hormones are not static. They shift in predictable patterns throughout your life, and recognizing those patterns is essential to understanding what your body is telling you.
The Reproductive Years (roughly 20s to early 40s)
During your reproductive years, estrogen and progesterone cycle together every month. In the follicular phase (days 1-14 of your cycle), estrogen rises, driving ovulation. In the luteal phase (days 14-28), progesterone rises after ovulation and then drops sharply if pregnancy doesn’t occur, triggering menstruation.
This monthly hormonal wave has real effects on energy, mood, strength, appetite, and cognition. Many women notice they feel sharpest, most social, and most energetic in the days around ovulation. The week before their period, when both estrogen and progesterone are dropping, is often when symptoms hit: irritability, low energy, food cravings, bloating, sleep disruption.
This is not a character flaw. It’s a hormonal pattern. And once you understand it, you can work with it rather than fighting it.
Perimenopause (often starting in the late 30s or early 40s)
This is where things get difficult for many women and where many women feel completely gaslit by the medical system.
Perimenopause is the transition phase before menopause. It can start as early as your late 30s (I work with providers who would ROLL their eyes at this statement, btw), often long before periods become irregular, and it’s characterized by fluctuating, unpredictable hormone levels rather than a simple decline. Estrogen levels swing dramatically- high one month, low the next. Progesterone often drops first.
The symptoms are wide-ranging and frequently misattributed: irregular periods, sleep disruption, increased anxiety, mood changes, brain fog, weight changes, hot flashes (yes, even in your 40s), decreased libido, and joint pain. These symptoms are often dismissed as stress or burnout, not hormonal transition.
Also important to note though- stress and burnout can absolutely worsen these symptoms for women as we read about cortisol.
I see this regularly in my practice: a woman in her early 40s who is being treated for anxiety when what she actually has is perimenopause. The conversation changes when we name it correctly.
Menopause and Post-Menopause
Menopause is defined as 12 consecutive months without a menstrual period. It typically occurs around age 51, though earlier is not uncommon. After menopause, estrogen and progesterone levels remain low. The health implications are significant: decreased bone density, increased cardiovascular risk, changes in body composition, vaginal changes, and continued mood and cognitive shifts.
This is not the beginning of decline. With the right support, whether lifestyle-based, hormonal, or both, post-menopause can be a remarkably vital phase of life.
The Most Common Signs That A Women’s Hormones Are Struggling
I’m going to give you the list that I work through when a woman comes into my practice and tells me something is off but her “labs came back normal.”
Because here’s the truth: reference ranges for hormones are broad. You can be within the normal range and still be at the low end of that range for your age, body, and symptom picture. Context matters. Symptoms matter. A number on a lab report is just one data point.
Signs your hormones may need attention:
Fatigue that doesn’t resolve with rest. This is the most common complaint I hear. Not just tired~ bone-tired, can’t-get-through-the-afternoon tired, coffee-dependent tired. Thyroid dysfunction, iron deficiency, cortisol dysregulation, and low progesterone all present this way.
Irregular or dramatically changed periods. Cycles that have always been regular and suddenly aren’t, periods that become significantly heavier or lighter, spotting between periods, cycles that shorten to less than 24 days or extend beyond 35. Your period is a vital sign, so any changes to it is important information.
Mood changes that feel disproportionate. Anxiety that arrives out of nowhere. Irritability that seems outsized relative to what’s actually happening. Depression that appears to track with your cycle. These can all have hormonal roots, particularly when progesterone is low or estrogen is fluctuating significantly.
Sleep disruption. Difficulty falling asleep, waking in the middle of the night and being unable to fall back asleep, or waking unrefreshed. Progesterone has a calming, sleep-promoting effect. When it’s low, sleep often suffers. Cortisol dysregulation also directly disrupts sleep architecture.
Weight changes without behavioral changes. If you’re eating and moving the same way you always have and your weight is shifting (particularly in your midsection) this deserves investigation. Thyroid function, insulin, cortisol, and declining estrogen all influence body composition.
Brain fog. Forgetting words. Losing your train of thought. Feeling like your brain is operating in slow motion. Estrogen directly influences cognitive function through its effects on serotonin and acetylcholine. Brain fog that correlates with hormonal fluctuation is real and worth addressing.
Decreased libido. Loss of interest in sex is common and widely undertreated in women. Low testosterone, low estrogen, elevated cortisol, and relationship stress can all contribute. This is worth talking about with your provider, not quietly accepting as normal.
Skin and hair changes. Increased acne (particularly around the jaw and chin), hair thinning or shedding, dry skin. Androgens, thyroid hormones, and estrogen all affect skin and hair health. These changes, especially when they appear alongside other symptoms, are worth noting.
What Actually Helps: Evidence-Based Approaches
I want to be clear: I’m an advocate for individualized care. There is no single approach that works for every woman, and what I’m sharing here is a framework, not a prescription. So I BEG YOU… Please work with a provider who will listen to your full picture.
That said, here are the interventions with the strongest evidence base:
Strength training, consistently. Three to four sessions of 30-minute strength training per week is one of the most powerful hormone-supporting interventions available to women. It improves insulin sensitivity, supports testosterone production, protects bone density as estrogen declines, reduces cortisol over time, and supports thyroid function. This is not a nice-to-have. It is, from a hormonal health standpoint, a clinical recommendation.
Protein intake that actually supports muscle. Most women eat significantly less protein than their bodies need, particularly as they age. Low protein intake contributes to muscle loss, slows metabolism, and destabilizes blood sugar~ all of which affect hormonal balance. Aim for 0.7 to 1 gram per pound of goal body weight. For most women, that’s a meaningful increase from where they currently are.
Sleep, protected like medication. Sleep is when your body produces and regulates hormones. Chronic sleep deprivation elevates cortisol, suppresses progesterone and testosterone production, increases insulin resistance, and impairs thyroid function. A consistent sleep schedule, a dark and cool room, and screens off 30 to 60 minutes before bed are not lifestyle extras… they’re necessary.
Stress management that actually reduces the load. I know everyone says “reduce stress.” What I mean is more specific: identify what is driving chronic nervous system activation in your life and remove or modify it where possible. Adding stress management techniques like meditation or breathwork is helpful. Reducing the actual stressor is more direct. For many of the women I work with, the most impactful change is subtracting something from their schedule, not adding a new practice to it.
A provider who takes you seriously. This is not a supplement or a lifestyle change. It’s a non-negotiable. You deserve a provider who listens to your full symptom picture, who asks about more than just whether your period is regular, who orders a comprehensive hormone panel when warranted, and who doesn’t dismiss your concerns with a “your labs are normal” and a prescription for antidepressants.
If you don’t have that provider yet, keep looking. You are allowed to advocate for yourself. You are allowed to ask for a second opinion.
When to Ask for a Comprehensive Hormone Panel
If you’re experiencing three or more of the symptoms I listed above, I encourage you to ask your provider for a comprehensive hormone panel, not just a TSH and a CBC.
A thorough evaluation might include:
- FSH (follicle-stimulating hormone) and LH (luteinizing hormone) – markers of reproductive function
- Estradiol – the active form of estrogen
- Progesterone – often tested on day 21 of the cycle for accuracy
- Total and free testosterone
- DHEA-S – an adrenal androgen
- TSH with free T3 and free T4 – not just TSH alone
- Fasting insulin and glucose – to assess insulin resistance
- Ferritin (not just hemoglobin) – iron storage, not just iron levels
- Vitamin D/Folate/Vitamin B12 – not routinely included but frequently deficient and hormonally relevant
- Cortisol (morning) – if chronic stress and cortisol dysregulation are suspected
You may have to ask specifically for some of these. You are allowed to ask.
A Note From My Practice to Yours
After five years of sitting with women in exam rooms, here is the thing I want you to carry with you:
Your symptoms are information. Your fatigue is not laziness. Your mood changes are not weakness. Your body’s signals deserve to be investigated, not dismissed.
Hormonal health is not a niche topic or a women’s wellness trend. It is core physiology. And understanding even the basics of how your hormones work, how they shift throughout your life, and what your body’s signals might mean is genuinely empowering in a way that goes beyond any single clinic visit.
You know your body. When something feels off, it’s worth pursuing. I hope this gives you the language and the framework to do exactly that.
The Bottom Line
Your hormones are at the center of almost everything: your energy, your mood, your weight, your sleep, your cycles, your long-term health. They shift throughout your life in predictable patterns, and they respond to how you eat, move, sleep, and manage stress. Understanding that picture is not complicated — but it does require that someone explain it to you.
Consider this the explanation I give every woman who walks into my practice and tells me something is off.
Now you have it too.
Olivia Carson is a board-certified Family Nurse Practitioner with five years of experience in OB/GYN, a certified personal trainer, and the creator of the VITAL Method — a five-pillar framework for sustainable women’s health built around real life, not ideal conditions. She lives in New England with her three kids and does every workout in her basement.
This post is for educational purposes and does not constitute medical advice. Please work with a qualified healthcare provider for personalized guidance.
References:
Prosperi, S., & Chiarelli, F. (2025). Insulin resistance, metabolic syndrome and polycystic ovaries: an intriguing conundrum. Frontiers in endocrinology, 16, 1669716. https://doi.org/10.3389/fendo.2025.1669716.