She started estrogen six months ago. The hot flashes are better. Sleep is still a problem. Mood is still unpredictable. Her libido hasn’t come back. She’s frustrated, because she was told hormones would help, and they’ve helped some things but not everything.
Her provider is puzzled too, because the estrogen levels look fine on paper.
What this scenario illustrates is a gap in how hormone therapy is often presented and prescribed. Estrogen gets the most attention because it’s the hormone associated with the most dramatic menopausal symptoms. But it’s one piece of a multi-hormone system, and restoring estrogen alone leaves the rest of that system unaddressed.
The Three-Hormone Picture
For women, the foundational hormones of the reproductive and endocrine system are estrogen, progesterone, and testosterone. All three decline during perimenopause and menopause, and all three play distinct and non-overlapping roles.
Estrogen handles the bulk of what we recognize as classic menopausal symptoms: hot flashes, night sweats, vaginal dryness, joint pain, and bone loss. Restoring estrogen addresses these directly.
Progesterone’s primary jobs include sleep regulation, anxiety reduction, and counterbalancing estrogen’s stimulating effects on uterine and breast tissue. When progesterone is low relative to estrogen, even when estrogen itself is in a reasonable range, the result is sleep disruption, mood instability, and cyclical symptoms like breast tenderness and irritability. Women who are given estrogen without adequate progesterone may actually feel worse in some respects, because the imbalance between the two hormones worsens.
Testosterone is the one most women are surprised to hear about in their own context. They associate it with male physiology. But women produce testosterone in meaningful amounts, it circulates at lower levels than in men, and when it declines, the effects are distinct: reduced libido, diminished mental clarity, loss of motivation, and decreased muscle tone. These are the symptoms that often remain after estrogen is addressed.
Why the Estrogen-Progesterone Balance Matters So Much
Estrogen and progesterone work in opposition in several biological contexts. Estrogen is the proliferative hormone, it stimulates cell growth. Progesterone is the counterbalancing signal that modulates estrogen’s effects on tissue.
When this balance tips too far toward estrogen, a state called estrogen dominance results. This doesn’t always mean estrogen is high in absolute terms. It can mean progesterone is low relative to estrogen. The clinical picture includes difficulty sleeping, anxiety, breast tenderness, heavier or irregular periods, and water retention.
This is why prescribing estrogen alone, without progesterone, can backfire for some women. The estrogen helps the hot flashes. But it also amplifies the symptoms that come from the lack of progesterone. The woman is getting treated, but only half of what needs treating is being addressed.
Bioidentical oral progesterone, typically taken at bedtime, has a calming neurological effect. It converts to allopregnanolone, a neurosteroid that supports GABA signaling, reducing anxiety and supporting deeper sleep. Women who have struggled with sleep for years sometimes describe progesterone as the piece that finally allowed them to rest.
What Testosterone Does for Women
Testosterone is often framed as a libido hormone for women, and it does affect libido. But framing it that way understates the case considerably.
Testosterone supports overall drive and motivation, not just sexual interest. It contributes to mental clarity and focus. It helps maintain lean muscle mass and supports insulin sensitivity. Women who are low in testosterone often describe a particular quality to their experience: a flatness, a disengagement, a lack of interest in things they used to care about. Not depression exactly. Something more like the lights being dimmed on everything.
When testosterone is restored to appropriate levels in women, the changes are often striking. Not just in the bedroom. At work. In conversations. In the gym. In relationships. In the sense of being present and interested in one’s own life.
The common fear is that testosterone will cause unwanted masculinizing effects. Specifically, women worry about body hair. This concern comes from dosing misconceptions. Women’s testosterone replacement uses much lower doses than anything prescribed for physiological male hormone levels. Dosed appropriately, the masculinizing effects that come from excess androgen simply don’t occur. The dose is calibrated to restore female testosterone to a healthy female range, not to exceed it.
One additional consideration: estrogen and testosterone need to be in reasonable proportion. A postmenopausal woman with very low estrogen who receives testosterone without adequate estrogen to balance it may tip toward androgenic effects. This is why testosterone isn’t typically prescribed in isolation. It’s part of a balanced protocol that considers the full hormonal picture.
Sex Hormone Binding Globulin: The Hidden Factor
One of the most commonly overlooked variables in female hormone assessment is sex hormone binding globulin, or SHBG.
SHBG is a protein that travels through the bloodstream and binds to testosterone molecules, rendering them inactive. Bound testosterone cannot enter cells and cannot produce any effect. What matters clinically is not total testosterone, but free testosterone and bioavailable testosterone, the fractions that SHBG hasn’t captured.
A woman can have total testosterone that looks fine on a standard panel while her free testosterone is critically low because SHBG is capturing most of it. She’ll have all the symptoms of testosterone deficiency despite a technically normal result. And without testing SHBG alongside free and bioavailable testosterone, no one will know why.
This is exactly the kind of nuance that gets missed in a conventional setting where the standard of care is to order total testosterone, if it’s ordered at all.
DHEA: The Precursor Everyone Forgets
DHEA is produced by the adrenal glands and serves as a precursor hormone. It converts downstream into both estrogen and testosterone. Think of it as the raw material. If the raw material is depleted, the finished hormones will be harder to maintain even with supplementation.
Chronic stress is the primary driver of suboptimal DHEA. When cortisol is chronically elevated because of sustained stress or trauma history, the adrenal glands prioritize cortisol production and produce less DHEA. Women who have been running under significant stress for years often present with low DHEA alongside low estrogen and testosterone.
Supplementing only the downstream hormones while ignoring DHEA is like trying to fill a pool without fixing the slow drain. The levels may improve somewhat, but the underlying depletion keeps pulling against you. Testing DHEA-S (the measurable form) and supplementing under clinical guidance when it’s low supports the entire hormonal cascade.
The Gut Connection to Hormonal Balance
No discussion of women’s hormone replacement is complete without addressing the gut.
The estrobolome is a subset of the gut microbiome that governs estrogen metabolism. These bacteria produce enzymes that conjugate estrogen for excretion. When the estrobolome is imbalanced, this conjugation process breaks down. Estrogen that should be eliminated gets reactivated and recirculated. The result is higher effective estrogen exposure even when prescribed doses are conservative.
For a woman on hormone therapy who is experiencing estrogen-excess symptoms (breast tenderness, bloating, mood instability) despite taking a reasonable dose, the gut may be the explanation. Testing beta-glucuronidase, an enzyme marker for estrogen metabolism dysfunction, can confirm this. Addressing the gut alongside the hormone protocol changes the outcome.
This is another reason why hormone replacement done well requires looking at more than just the hormones themselves.
Monitoring That Actually Reflects What’s Happening
Standard monitoring for women on hormone therapy often consists of a blood draw every year that checks estrogen and maybe progesterone. That gives a snapshot of circulating levels. It doesn’t show how those hormones are being metabolized, whether the progesterone is converting appropriately, what cortisol rhythm looks like, or whether SHBG is affecting testosterone availability.
The Dutch test, a dried urine comprehensive hormone panel, addresses all of these. It’s the gold standard for ongoing management because it reveals the metabolic picture that blood work can’t access. After starting hormone therapy, rechecking at around ten weeks with a combination of blood work and a Dutch panel gives a full view of how the body is responding. From there, quarterly monitoring and dose adjustment as needed keeps the protocol aligned with the woman’s actual needs as they change over time.
Why the Full Picture Is Worth Pursuing
The woman who started this article was getting partial help from estrogen because she was only getting partial treatment. Her progesterone hadn’t been addressed. Her testosterone hadn’t been evaluated. Nobody had checked SHBG. Nobody had asked about gut health.
Adding progesterone improved her sleep. Adding appropriate testosterone brought back the mental clarity and motivation she’d been missing for two years. The hot flashes were already managed. But the full picture of feeling like herself again required addressing all three hormones, not just the one that gets the most attention.
That’s the case for comprehensive hormone therapy. Not estrogen alone. The whole system.
About the Author: Dr. Sasha Rose is a naturopathic physician and licensed acupuncturist at Med Matrix, a functional medicine clinic in South Portland, Maine. She specializes in women’s hormone health, bioidentical hormone therapy, and root-cause approaches to perimenopause and menopause.
