Hormone Testing for Women: DUTCH vs Blood, and When to Test

There is no single best hormone test for women. Serum (blood), saliva and dried urine each measure different things, and the right choice depends on the question you want answered and where you are in your cycle. Serum is the reference standard for diagnosis and for anything a specialist will act on. Dried urine shows how your body processes hormones and how cortisol moves across a day, which serum can't show from one draw. Saliva measures the free part of a hormone. It is reliable for some hormones and poor for others. Most hormone panels that let you down fail for one of three reasons. The sample was taken on the wrong cycle day, the test answered a question nobody was asking, or the result was held up against an "optimal" range with no evidence behind it. This article sets out what each method measures, why timing matters, what metabolites add, what regulatory certification does and does not guarantee, and how a result should change your plan.

In this article

• Serum, saliva and dried urine measure different fractions of the same hormones
• Cycle timing determines whether a result is interpretable at all
• Metabolite testing answers questions a single blood draw cannot
• CLIA certification is a laboratory quality standard, not proof that a test is clinically useful
• Reference ranges and "optimal" ranges are built differently, and the difference matters
• What each panel typically costs, and what a result should change

What each method actually measures

Serum measures the total hormone level at one moment. Most of the estradiol and testosterone in your blood is bound to the proteins sex hormone binding globulin (SHBG) and albumin. So a total value shows both how much you make and how much those proteins can hold. That is why free testosterone and SHBG tell you things that total testosterone alone does not. Serum is the basis of nearly all diagnostic guidance, including the Endocrine Society clinical practice guidelines, and it is what any endocrinologist or gynecologist will want to see.

Saliva measures the free (unbound) part of a hormone, the part your body can use. For cortisol this is truly useful. Saliva cortisol is a validated test and is used in mainstream endocrinology, including late-night salivary cortisol when Cushing syndrome is suspected. For estradiol, progesterone and testosterone, saliva tests are far less reliable. Results vary widely and match serum poorly, which is why they are not used for diagnosis.

Dried urine measures hormones and their metabolites (what your body turns them into) that you pass over the time you collect. Four or five timed samples across a day catch the pattern, not just a snapshot, which suits cortisol most of all. Because urine carries the metabolites made further down the line, it can show the routes your body uses to process hormones, which serum cannot see.

Dried blood spot uses capillary blood, such as from a finger prick, instead of a draw from a vein, so it suits at-home collection. How well it has been validated varies a lot from one marker to the next, so it is only as good as the exact assay used.

Side by side: serum, saliva and dried urine

Cycle-day timing, and why it decides everything

A hormone result only means something when you know where you are in your cycle. Estradiol is several times higher at its peak just before ovulation than in the early follicular phase, the first few days of your cycle. Progesterone rises about tenfold after ovulation. A value with no cycle day attached can't be interpreted.

• Cycle days 2 to 4 for FSH and estradiol. This early follicular window is where reference data from large groups of women exist. A single FSH does not stage perimenopause, because it swings a lot from one cycle to the next.
• About 7 days after ovulation for progesterone, which is the mid-luteal peak. The common advice to test on day 21 assumes a 28-day cycle with day-14 ovulation. In perimenopause, when cycles get shorter and ovulation shifts, day 21 often lands after progesterone has already fallen. That gives a falsely low result. Confirm ovulation with LH testing or basal temperature, then count forward.
• Any day for thyroid tests, ferritin, AMH, DHEA-S, HbA1c and vitamin D.
• Morning, 7 to 9 a.m. for serum cortisol and testosterone, since both follow a daily rhythm.
• Any day if you no longer have cycles, or if your cycles are so irregular that you can't tell which phase you are in. In that case, testing again over time tells you more than one panel.

Combined hormonal contraception (birth control) holds down your body's own FSH, estradiol and progesterone. So sex hormone tests taken while you use it can't stage the transition. Thyroid, ferritin and metabolic markers can still be read. Any choice to pause birth control for clearer test results belongs with the clinician who prescribes it, and you still need birth control until menopause is confirmed. The staging system behind all of this is set out in the early signs of perimenopause.

What metabolites show that blood cannot

This is the solid case for urine testing, and it is worth setting out exactly, not as a sales pitch.

Estrogen metabolism. Your body processes estradiol down the 2-hydroxy, 4-hydroxy and 16-hydroxy pathways. An enzyme called catechol-O-methyltransferase then methylates those metabolites. Urine panels report the share that goes down each path. Population studies have looked at the ratios between these pathways and breast cancer risk, with mixed and largely inconclusive results. So these are best read as a picture of the routes, not a risk score. A serum estradiol tells you the level; it tells you nothing about the route.

Androgen routing. Your body processes testosterone down 5-alpha and 5-beta pathways. Higher 5-alpha activity has a biological link to acne, hair thinning and hirsutism (extra hair growth on the face or body). It can be high while total testosterone sits mid-range. For a clinician, this is the most intuitive thing metabolite testing adds.

Cortisol versus cortisone, across a day. Serum cortisol from one morning draw can't show a flat curve or a high evening value. Several timed urine or saliva samples can. Free cortisol, read with its inactive partner cortisone, tells apart how much cortisol you make from how fast you clear it. This describes a rhythm: cortisol rhythm, the measurable side of what is often called "adrenal fatigue". It does not replace morning serum cortisol or ACTH stimulation testing when true adrenal insufficiency is suspected.

Melatonin and certain organic acids appear on some panels as markers of sleep signaling and of how your body processes B vitamins and neurotransmitters. These add supporting context, and the evidence that links them to specific treatments or changes is limited.

Validation and limitations: what CLIA does and does not mean

Almost every functional test is marketed as "CLIA-certified", so it helps to know what that means. CLIA stands for the Clinical Laboratory Improvement Amendments. These are run by the Centers for Medicare and Medicaid Services, and they set standards for lab staff, quality control, proficiency testing and record keeping. CLIA shows that a lab runs its processes to a set standard. It says nothing about whether the test predicts anything useful for your care.

Most specialty hormone panels are laboratory-developed tests, or LDTs. That means one lab designs them, validates them and runs them. The FDA has in the past used its discretion not to enforce its rules on this kind of test. So LDTs mostly have not gone through the premarket review that commercial diagnostic kits go through. Precision Analytical, the lab that runs the DUTCH panels, has published work that validates its methods. It covers accuracy, precision and comparison against liquid chromatography tandem mass spectrometry. Its assays use LC-MS/MS rather than immunoassay, which is a real advantage in how well they measure. But method validation and clinical validation are separate questions. Showing that a test measures a metabolite accurately is not the same as showing that acting on that metabolite improves health outcomes.

Three more limits are worth keeping in mind. How much of each metabolite comes out in urine depends on kidney function and how hydrated you are. The reference groups for these panels are smaller than for routine serum tests. And practitioners read these results in different ways, which is a real source of over-treatment. In the hands of a clinician who knows their limits, these panels are useful context for raising ideas to check, and anything that would change your care should be confirmed on serum. That is the standard we apply within the functional medicine process at Interlinked Wellness.

Optimal ranges versus reference ranges

A lab's reference range is usually the middle 95 percent of results from a reference group. That means one in twenty healthy people falls outside it by definition. Ranges also differ between labs because their assays differ, so the same sample can get different flags at different labs.

"Optimal" ranges, common in functional medicine reports, are narrower bands meant to show where your body works best rather than where disease begins. Sometimes there is a basis for them that holds up. Vitamin D thresholds are one example. Another is the observation that a thyroid-stimulating hormone in the upper part of the reference range, with positive antibodies and clear symptoms, deserves attention. Often there is no such basis: several widely shared optimal ranges come from expert opinion rather than from outcome data. The risk runs both ways. A rigid reference range can dismiss a woman with real symptoms; a narrow optimal range can turn a healthy value into a target for treatment. The sensible middle ground is to treat symptoms and trends in context, use ranges as a guide, and ask for stronger evidence the bigger the step being taken.

What it costs

Prices vary by lab, region and insurance, so these are broad market ranges, not quotes. A standard serum hormone panel run through insurance is often the cheapest route, and it is often covered when there is a documented medical reason for the test. If you pay yourself, serum panels from direct-to-consumer labs commonly fall in the low hundreds of dollars. Full dried-urine panels such as DUTCH Complete tend to cost several hundred dollars and are usually self-pay, though you can often claim them back through an HSA or FSA. Saliva cortisol panels sit at the lower end. Ask three questions before you order anything. What decision will this result guide? Can I get the same answer from a serum test my insurance covers? And who will read the result? Testing that can't change your plan is money spent, not information gained.

How results should change the plan

Testing that does not change a decision does not need to be done. If you want the workup built around a question rather than a panel, our perimenopause and menopause care and the wider guide to perimenopause set out how the pieces fit, and a consultation is where your specific plan gets built.

FAQ

Is the DUTCH test better than blood testing?

Neither the DUTCH test nor a blood test is better; they answer different questions. Serum is the standard for diagnosis, it can be compared across labs, and it is what specialists act on. Dried urine adds metabolite routing and a picture of cortisol across a day, which one blood draw can't give you. In practice, serum answers "what are the levels", and dried urine answers "how is the body handling them". Anything on a urine panel that would change your care should be confirmed on serum before it drives a treatment decision.

What day of my cycle should I test hormones?

Test FSH and estradiol on cycle days 2 to 4. Test progesterone about seven days after ovulation, not by default on day 21. Day 21 assumes a 28-day cycle with ovulation on day 14. That is often wrong in perimenopause and gives a falsely low progesterone. Thyroid tests, ferritin, AMH, DHEA-S and vitamin D can be drawn on any day. Serum cortisol and testosterone should be drawn between 7 and 9 a.m.

Are at-home hormone tests accurate?

How accurate a test is depends on what it measures and the assay used, not on whether the sample was collected at home. Saliva cortisol collected at home is well validated. Saliva estradiol and progesterone are not reliable. How well dried urine and dried blood spot tests perform varies by lab and by the exact assay method. Methods based on mass spectrometry generally do better than immunoassays. How you collect matters too: hormone products put on the skin, recent food and drink, and samples taken at the wrong time all throw off results.

Will my insurance cover hormone testing?

Standard serum panels ordered for a documented medical reason can usually be billed to insurance. Specialty dried-urine and saliva panels are mostly self-pay, though many can be paid for with HSA or FSA funds. Coverage varies by plan and by diagnosis code. So it is worth asking which tests can be run through the coverage you have before you add a self-pay panel, and checking with your insurer rather than the lab.

References

1. Endocrine Society. Endocrine Society. 2022. https://www.endocrine.org/clinical-practice-guidelines
2. Centers for Medicare and Medicaid Services. Centers for Medicare and Medicaid Services. 2026. https://www.cms.gov/medicare/quality/clinical-laboratory-improvement-amendments
3. U.S. Food and Drug Administration. U.S. Food and Drug Administration. 2025. https://www.fda.gov/medical-devices/in-vitro-diagnostics/laboratory-developed-tests

About the author

Medical disclaimer. The information on this page is provided for general education and is not individualized medical advice. At Interlinked Wellness, Anna Evans, MSN, APRN, FNP-C, provides personalized care based on your health history, symptoms, concerns, and goals. An individual consultation allows Anna to evaluate your specific situation and recommend an appropriate approach to care. Reading this page alone does not establish a patient-provider relationship. If you are experiencing a medical emergency, call 911 or your local emergency services.