An androstenedione test measures how much of a single steroid hormone is circulating in your blood at the moment the sample is drawn. Androstenedione is a precursor hormone: your adrenal glands and your ovaries or testicles build it first, then convert it into testosterone and estrone. Because it sits at that crossroads, it often reveals hormonal problems that a testosterone measurement alone can miss. Doctors order it when someone has unexplained acne, excess body hair, irregular periods, early puberty, or a suspected adrenal condition. In this article you will learn what the test measures, how it is collected, how to read the numbers and units on your report, what high and low results usually point to, and which other hormones your clinician will look at alongside it.
What an androstenedione test measures
Androstenedione is classified as a weak androgen. Androgens are the family of hormones that drive typically male characteristics, and they are present and necessary in every body regardless of sex. On its own, androstenedione has only modest biological activity. Its importance comes from what happens next: enzymes in the ovaries, testicles, fat tissue, skin, and hair follicles convert it into more potent hormones.
Where the hormone is made
In women who have not reached menopause, roughly half of circulating androstenedione comes from the adrenal glands, the two small glands that sit on top of the kidneys, and roughly half comes from the ovaries. In men, most of it comes from the adrenal glands, with a smaller contribution from the testicles. After menopause, ovarian output falls sharply and the adrenal glands become the dominant source. That split matters, because it explains why a high result does not immediately tell your doctor which organ is responsible.
Why a precursor hormone is worth measuring
Androstenedione is one step away from testosterone and one step away from estrone, a weaker form of estrogen. When an enzyme upstream of it is faulty, or when a gland is overactive, androstenedione can climb well before other markers move. Clinicians therefore read it as an early or supporting signal rather than a stand-alone verdict, and they normally pair it with a testosterone measurement. You can review how that partner marker behaves in our testosterone blood level guide.
When doctors order an androstenedione test
This is not a routine screening test. It is requested when a specific pattern of symptoms suggests that androgen production has shifted, or to monitor a condition that is already known.
In women and people assigned female at birth
The most common triggers are hirsutism, meaning coarse hair growth in a male pattern on the face, chest, or abdomen; persistent adult acne; scalp hair thinning; irregular or absent periods; and difficulty conceiving. Polycystic ovary syndrome is the condition most often behind these signs, and some clinics have begun using the newer name polyendocrine metabolic ovarian syndrome for it. Doctors frequently order the test together with a binding-protein measurement, since low binding protein raises the share of hormone that is biologically active; our SHBG blood test guide explains that relationship in plain terms.
In men and people assigned male at birth
Testing is less common here. It is used mainly when an adrenal tumor is suspected, when breast tissue enlarges without a clear cause, or when a man with a known enzyme disorder is being monitored. Interpretation always happens next to a testosterone result rather than in isolation.
In children
Pediatric endocrinologists order it when puberty starts unusually early, when growth accelerates out of step with age, or when genital development is ambiguous at birth. Newborn screening in the United States already flags the classic form of congenital adrenal hyperplasia, and androstenedione is one of the hormones followed afterward to judge whether treatment doses are right.
Alongside adrenal investigations
When the adrenal glands themselves are under suspicion, androstenedione rarely travels alone. Your clinician may add a stress-hormone measurement and a pituitary signal test to see whether the gland is being over-stimulated from above. Both are covered in our cortisol blood test guide and our ACTH blood test guide.
How the androstenedione test is performed
A phlebotomist draws blood from a vein in your arm, usually into a plain or gel-separator tube; the exact tube color depends on the laboratory and does not affect your result. The draw takes a couple of minutes and needs no special recovery time. Bruising at the puncture site is the only common side effect.
Timing and preparation
Androstenedione follows a daily rhythm, peaking in the morning and drifting down through the day, so most laboratories ask for a morning sample. In menstruating women, levels also rise around the middle of the cycle, which is why clinicians often request the draw in the first week after a period starts. Fasting is not usually required, but some panels drawn at the same time do require it. Tell the laboratory about any hormonal contraception, corticosteroid, or supplement you take, because several of these change the result. Your clinician may also want a mid-cycle picture of pituitary signaling, described in our luteinizing hormone guide and our follicle-stimulating hormone guide.
Why the laboratory method matters
Two very different technologies are used to measure this hormone. Older immunoassays rely on antibodies and can be thrown off by chemically similar steroids in the sample. Liquid chromatography with tandem mass spectrometry separates molecules by weight and gives a cleaner reading, particularly at the low concentrations found in children and postmenopausal women. If two of your results disagree, the method is one of the first things to check, and results from different methods should not be compared directly.
Reference ranges and how to read your report
Androstenedione is reported in nanograms per deciliter (ng/dL) or nanograms per milliliter (ng/mL) in the United States, and in nanomoles per liter (nmol/L) elsewhere. One ng/mL equals 100 ng/dL. Always read the range printed next to your own value: it belongs to the laboratory that ran the sample, and it reflects that laboratory’s method and population.
| Group | Commonly reported adult interval | What shifts it |
|---|---|---|
| Women before menopause | About 30 to 330 ng/dL | Cycle day, time of day, hormonal contraception |
| Women after menopause | Lower, often under 180 ng/dL | Loss of ovarian output; adrenal share rises |
| Adult men | About 50 to 310 ng/dL | Time of day, adrenal activity |
| Children before puberty | Very low, often under 50 ng/dL | Adrenal maturation, pubertal stage |
| Adolescents | Rises toward adult values | Pubertal stage rather than chronological age |
These figures are typical published intervals and are shown to help you orient yourself, not to replace the range on your own report. A value slightly outside the printed interval is common and is rarely meaningful on its own.
Reading the result in context
A single number carries little weight. Clinicians read androstenedione next to testosterone, the adrenal precursor measured in our DHEA-S blood test guide, and the enzyme-blockage marker described in our 17-OH progesterone guide. The combination of markers, not any one of them, points toward a source.
What high androstenedione levels usually mean
An elevated result says that androgen production has increased somewhere, and the next job is to find out where. The most frequent explanations are, in rough order of how often they appear:
- Polycystic ovary syndrome, where the ovaries produce excess androgens and cycles become irregular.
- Nonclassic congenital adrenal hyperplasia, a partial enzyme deficiency that often surfaces only in the teenage years or later.
- An adrenal or ovarian tumor, uncommon but important to exclude when levels are very high and symptoms appeared quickly.
- Cushing syndrome and other states of adrenal overactivity.
- Use of androgen-containing supplements or anabolic steroids.
How your clinician narrows it down
A practical sequence looks like this. First, confirm the abnormal value on a properly timed morning sample. Second, measure 17-OH progesterone: if it is clearly raised, an adrenal enzyme problem moves to the front of the list, and a stimulation test usually follows. Third, if that marker is normal but cycles are irregular and binding protein is low, ovarian causes such as polycystic ovary syndrome become more likely, and insulin resistance is assessed. Fourth, if the values are strikingly high and symptoms arrived over months rather than years, imaging of the adrenal glands and ovaries is arranged to look for a tumor.
The metabolic thread
Androgen excess in women is closely tied to how the body handles blood sugar. High insulin pushes the ovaries to make more androgens and lowers the binding protein that keeps them inactive, which amplifies the effect. That is why a hormone workup so often includes the markers explained in our insulin blood test guide and our fasting glucose test guide.
What low androstenedione levels usually mean
Low results attract less attention but are not meaningless. Adrenal insufficiency, in which the adrenal glands underproduce across the board, lowers androstenedione along with cortisol. Long-term corticosteroid treatment suppresses adrenal output and does the same. Ovarian failure, sickle cell disease, and simply being postmenopausal all shift values downward. In men, low androstenedione alongside low testosterone points toward reduced gonadal function rather than an adrenal problem.
Symptoms that accompany genuinely low androgen production are non-specific: fatigue, low mood, reduced libido, and loss of pubic or underarm hair. Because those complaints have many causes, clinicians rely on the full hormone picture, including the estrogen marker covered in our estradiol blood test guide.
When to see a doctor
Book an appointment rather than waiting for the next routine visit if you notice any of the following:
- Coarse new hair growth on the face, chest, or abdomen that appeared over a few months.
- Periods that become irregular, very light, or stop altogether without pregnancy.
- A deepening voice, scalp hair loss at the temples, or increasing muscle bulk in a woman.
- Signs of puberty in a child before age eight in girls or nine in boys.
- Persistent acne that does not respond to standard dermatological treatment.
- Severe fatigue with dizziness on standing, which can signal adrenal insufficiency and needs prompt assessment.
Rapid onset matters more than the size of the number. Symptoms that develop over months deserve faster attention than the same symptoms present since adolescence.
Latest scientific advances
Research over the past three years has clarified where this hormone belongs in a diagnostic workup, and the findings are practical rather than abstract.
Androstenedione is a second-line marker, not a first-line one
A 2025 systematic review and diagnostic meta-analysis in Human Reproduction Update pooled eighteen studies to compare androgen measurements head to head for diagnosing hormonal androgen excess in polycystic ovary syndrome. Total testosterone and free testosterone performed best; androstenedione was less precise, meaning it more often flagged people who did not have the condition. The same analysis found that mass spectrometry, the weighing-based laboratory method, outperformed antibody-based assays across markers. What this means for you: if your clinician measured testosterone first and added androstenedione afterward, that is the current evidence-based order, and an androstenedione result from a mass spectrometry laboratory is worth more than one from an older assay.
Androgen excess does not simply stop at menopause
A 2023 systematic review and meta-analysis, also in Human Reproduction Update, gathered data on women aged forty-five and older with polycystic ovary syndrome. Circulating androgens including androstenedione remained higher than in comparison groups even after menopause, and remained higher even when body weight was similar. The authors stress that the underlying studies varied a great deal, so this is a consistent signal rather than a settled fact. What this means for you: a diagnosis made in your twenties does not expire, and continued monitoring after menopause is reasonable.
Inositol supplements move the hormone, with caveats
A 2026 umbrella review in Frontiers in Endocrinology examined thirteen earlier meta-analyses of inositol, a naturally occurring sugar-like compound sold as a supplement, in polycystic ovary syndrome. Pooled results showed lower testosterone and androstenedione, higher binding protein, better insulin sensitivity, and improved ovulation and pregnancy rates compared with placebo. The authors rated most of that evidence as low or moderate quality and found no clear advantage over standard treatment. What this means for you: inositol looks promising and is generally well tolerated, but it is not a replacement for a treatment plan, and any supplement should be discussed with the clinician who ordered your test.
Sleep problems in androgen excess track a different marker
A 2025 systematic review and meta-analysis in Clinical Endocrinology looked at sleep disorders in polycystic ovary syndrome. Obstructive sleep apnea, a condition in which breathing repeatedly pauses during sleep, was common. Women with the condition and sleep apnea had lower sex hormone-binding globulin than those without, while androstenedione, testosterone, and DHEA-S showed no such difference. What this means for you: if you snore heavily or wake unrefreshed, mention it to your doctor even when your androgen results look ordinary, because the two problems appear to travel on different tracks.
Glossary
| Term | Definition |
|---|---|
| Androgen | A family of hormones, including testosterone and androstenedione, that drive typically male characteristics. Everyone produces them in some amount. |
| Precursor hormone | A hormone the body converts into another, more active hormone. Androstenedione is a precursor of testosterone and estrone. |
| Adrenal glands | Two small glands sitting on top of the kidneys that make cortisol, aldosterone, and several androgens. |
| Hirsutism | Coarse hair growth in a male pattern on the face, chest, or abdomen in a woman, often the first visible sign of androgen excess. |
| Congenital adrenal hyperplasia | An inherited enzyme deficiency, most often of 21-hydroxylase, that pushes adrenal production toward androgens. A milder nonclassic form can appear later in life. |
| Sex hormone-binding globulin | A protein that carries sex hormones in the blood and keeps them inactive while bound. When it falls, more hormone becomes available to tissues. |
| Mass spectrometry | A laboratory method that identifies molecules by their weight. It is more specific than antibody-based assays for measuring steroid hormones. |
| Reference interval | The range of values seen in a healthy reference population for a given laboratory and method. It is printed next to your result. |
| Polycystic ovary syndrome | A common hormonal condition combining irregular ovulation, signs of androgen excess, and characteristic ovarian appearance. Some clinics now call it polyendocrine metabolic ovarian syndrome. |
| Adrenal insufficiency | A condition in which the adrenal glands produce too little cortisol and, usually, too few androgens. |
Frequently asked questions
What is a normal androstenedione level?
There is no single universal number. Adult women before menopause are commonly reported around 30 to 330 ng/dL and adult men around 50 to 310 ng/dL, but every laboratory publishes its own interval based on its method and the population it serves. Children have much lower values that rise through puberty, and postmenopausal women sit lower than younger women. Read the range printed beside your own result, and compare results over time only when they come from the same laboratory using the same method.
What does a high androstenedione level in a woman mean?
It means androgen production has increased, not that a specific diagnosis is confirmed. Polycystic ovary syndrome is the most common explanation, followed by nonclassic congenital adrenal hyperplasia. Less often, an adrenal or ovarian tumor is responsible, which is why a markedly high value combined with symptoms that appeared quickly prompts imaging. Supplements containing androgens can also raise the result. Your clinician will repeat the test on a correctly timed morning sample and look at testosterone, 17-OH progesterone, and binding protein before drawing conclusions.
What does a low androstenedione level mean?
Low values are far less often a concern than high ones. The usual explanations are adrenal insufficiency, ongoing corticosteroid treatment that suppresses the adrenal glands, ovarian failure or menopause, and reduced testicular function in men. Sickle cell disease is also associated with lower values. Because a low result alone rarely causes symptoms, doctors interpret it next to cortisol and testosterone rather than treating the number itself.
Do you need to fast before an androstenedione test?
Fasting is not usually required for this measurement on its own. What matters more is timing: the hormone peaks in the morning, so most laboratories want an early sample, and in menstruating women the draw is often scheduled in the first week of the cycle. If other tests such as glucose or a lipid panel are drawn at the same appointment, those may require fasting, so follow the instructions on your requisition form.
What tube color is used for an androstenedione test?
It varies by laboratory. Serum is the usual sample type, so a plain red-top or a gold or tiger-top gel-separator tube is typical, and some laboratories accept plasma in a green-top tube. The color coding is a handling instruction for the phlebotomist and has no bearing on what your result means. If you are having blood drawn at a different facility from the one that will run the analysis, the collecting site will confirm the correct tube with the testing laboratory.
Is the androstenedione test useful in men?
It is used selectively. In men, the main reasons are suspicion of an adrenal tumor, unexplained breast tissue enlargement, or monitoring of a known enzyme disorder such as congenital adrenal hyperplasia. It is not part of a standard male hormone panel, and a testosterone measurement answers most questions about male androgen status. When androstenedione is ordered, it is read alongside testosterone, DHEA-S, and, where relevant, pituitary hormones.
Sources
- Bizuneh AD, Joham AE, Teede H, et al. — Evaluating the diagnostic accuracy of androgen measurement in polycystic ovary syndrome: a systematic review and diagnostic meta-analysis to inform evidence-based guidelines — Human Reproduction Update, 2025 — doi.org/10.1093/humupd/dmae028
- Millán-de-Meer M, Luque-Ramírez M, Nattero-Chávez L, Escobar-Morreale HF — PCOS during the menopausal transition and after menopause: a systematic review and meta-analysis — Human Reproduction Update, 2023 — doi.org/10.1093/humupd/dmad015
- Duan M, Yang M, Li C, et al. — Effects of inositol in women with polycystic ovary syndrome: an umbrella review of meta-analyses from randomized controlled trials — Frontiers in Endocrinology, 2026 — doi.org/10.3389/fendo.2026.1741509
- Abdul Jafar NK, Fan M, Moran LJ, Mansfield DR, Bennett CJ — Sex Hormones, Sex Hormone-Binding Globulin and Sleep Problems in Females With Polycystic Ovary Syndrome: A Systematic Review and Meta-Analysis — Clinical Endocrinology, 2025 — doi.org/10.1111/cen.15219
- MedlinePlus Genetics, National Library of Medicine — 21-hydroxylase deficiency — MedlinePlus, reviewed 2025 — medlineplus.gov
- Mayo Clinic Staff — Polycystic ovary syndrome: symptoms and causes — Mayo Clinic, 2025 — mayoclinic.org
- Cleveland Clinic — Polycystic ovary syndrome: symptoms, causes and treatment — Cleveland Clinic Health Library, 2025 — my.clevelandclinic.org
- Johns Hopkins Medicine — Congenital adrenal hyperplasia — Johns Hopkins Health Library, 2025 — hopkinsmedicine.org
Further reading
- Explore the pituitary hormone that rises when milk production is stimulated by reading our prolactin blood level guide.
- Assess how your body handles blood sugar after an overnight fast with our fasting glucose test guide.
- Look up the definition of the main adrenal androgen precursor in our DHEA meaning entry.
- Check whether a thyroid imbalance is contributing to irregular cycles with our TSH blood test guide.
- Compare a 24-hour urine measurement of your stress hormone using our urine cortisol results guide.
Understand your lab results with BloodSense
Hormone reports are hard to read because the numbers only make sense together. BloodSense turns your androstenedione, testosterone, DHEA-S, and SHBG results into plain language, shows how each value sits against its reference interval, and highlights the patterns worth raising with your clinician. It helps you understand what you are looking at before your appointment. It does not diagnose and it does not replace your doctor.
