The DUTCH Test on Hormone Therapy: What It Can and Cannot Read
The DUTCH test measures hormones by what the body has done with them — the metabolites that end up in dried urine. That is its strength, and it is also why the test behaves differently once a woman is on hormone therapy: what shows up in the urine depends on how the hormone got into her, and some routes are read faithfully while others are misread badly.
This page is the guide to which is which. It is the one place on the site the question of testing on topical hormones is answered, and the progesterone cream page links here for that reason.
Why route changes what the test sees
A hormone swallowed passes through the liver first, is metabolized heavily, and its breakdown products are excreted in urine in large amounts. A hormone absorbed through the skin enters the bloodstream directly, is metabolized more slowly, and a smaller fraction reaches the urine as metabolites — while a vaginal product barely enters the circulation at all.
The DUTCH test measures the metabolites. So for the same amount of hormone actually acting in the body, an oral product produces a large urinary signal, a transdermal one a modest signal, and a vaginal one very little. Reading the test without knowing the route is reading a number without its unit.
Route by route
Oral micronized progesterone. Read well — arguably over-read. Oral progesterone is extensively metabolized in the liver, and its metabolites appear in urine in abundance. The DUTCH result will confirm the woman is taking it and roughly at what level; it will not tell her much about tissue exposure that a clinician did not already know from the prescription.
Topical or transdermal progesterone cream. Read badly, and this is the trap. Progesterone applied to the skin produces very low serum levels and very low urinary metabolites, and the DUTCH result will typically report her progesterone as low or unchanged. Some women — and some practitioners — respond by increasing the cream. That is a mistake, and a potentially serious one, because the cream does not protect the uterus regardless of what the test says. A low DUTCH progesterone on cream is not a reason to use more cream. It is a reason to use the capsule.
Transdermal estradiol — patch, gel, cream. Read reasonably, with a caveat. The metabolites appear, the estrogen pathways can be assessed, and the result is interpretable by someone who knows the route. Absolute levels will look lower than on an oral product for the same clinical effect, so comparing a woman's result on a patch to a reference range built partly on oral users misleads.
Oral estradiol. Read well, and — as with oral progesterone — the signal is large. Pathway ratios remain useful.
Vaginal estriol or estradiol. Barely read at all, which is correct: very little is absorbed. A DUTCH test on a woman using only a vaginal product looks essentially like a DUTCH test on an untreated woman, and that is the expected result, not a failure of the product.
Testosterone or DHEA in women. Read reasonably; the androgen metabolites and the DHT pathway markers are among the test's more useful outputs on therapy.
When blood is the right test instead
For a woman on a patch or cream who wants to know whether she is absorbing it, a serum estradiol is the direct measurement, and it is what we use for that question. For a woman on progesterone cream who wants to know whether her uterus is protected, no test answers it — the answer is on the cream page, and it is the capsule.
The DUTCH test earns its place on hormone therapy when the question is about pathways rather than levels: how estrogen is being metabolized — see estrogen metabolites — what the cortisol pattern looks like, whether androgens are going down the DHT route. Those are questions a blood test cannot answer, and they are the reason the DUTCH test exists.
Do I stop my hormones before the test?
Usually not, and never on your own initiative. Stopping hormone therapy to "get a true baseline" produces a result that describes a woman who is not on therapy, which is not the woman being treated. The hub page FAQ covers timing; the general rule is that the test is done on therapy, at a consistent point relative to the last application, and interpreted by someone who knows the product and the route.
The exception is a genuine pre-treatment baseline in a woman who has not yet started, which is the most informative DUTCH test of all and the one we most often recommend.
Frequently asked questions
Yes. Interpretation depends on the route — oral products are read well, transdermal reasonably, vaginal barely, and topical progesterone cream badly. The clinician needs to know exactly what you use.
Because topical progesterone produces very low urinary metabolites. The result is expected and is not a reason to use more cream — the cream does not protect the uterus at any level.
Reasonably. Metabolites appear and pathways can be assessed, though absolute levels look lower than on oral estrogen for the same effect.
Not on your own. The test is usually done on therapy at a consistent timing. A true baseline is only meaningful before starting.
When the question is "am I absorbing this" — serum estradiol answers that directly. DUTCH is for pathway questions: estrogen metabolism, cortisol pattern, androgen routing.
No test does. Uterine protection comes from oral micronized progesterone, not from a number.
Where this fits in your plan
The DUTCH Test page covers what it measures and who it suits. If you are on hormone therapy and considering it, the product list and the route are the first things we ask.
We measure first. Then we act.
References
- Precision Analytical Inc. DUTCH Test provider guidance: hormone replacement therapy and interpretation by route of administration.
- Newman M, Curran DA. Reliability of a dried urine test for comprehensive assessment of urine hormones and metabolites. BMC Chemistry 2021;15:18.
- Stanczyk FZ et al. Percutaneous administration of progesterone: blood levels and endometrial protection. Menopause 2005;12:232–237.
- The Menopause Society. The 2022 Hormone Therapy Position Statement. Menopause 2022;29:767–794 — on hormone level testing during therapy.
- Kuhl H. Pharmacology of estrogens and progestogens: influence of different routes of administration. Climacteric 2005;8(Suppl 1):3–63.
How we write and review our content
ACT 2 Health provides clinician-led care. Treatments are available only to eligible patients following clinical evaluation and within applicable regulations. This content is educational and is not medical advice. Individual results vary.
Diagnostic testing does not diagnose or rule out disease on its own and is interpreted by a licensed provider alongside your history and examination.
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