# Hormone panel: what each test means

> Doctano turns the lab reports you already have into one private, source-linked health timeline, with an AI that answers from your own results.

Three hormones from three different systems, each with its own rhythm, its own binding, and its own timing.

This is the Markdown version of https://doctano.com/panels/hormone-panel. The HTML page is the canonical version.

A hormone panel groups testosterone, cortisol, and prolactin. Each comes from a different axis and is read against its own printed range. The time and conditions of the sample are part of the result, and a single value is a snapshot rather than a conclusion. PSA is not a hormone and is not part of this panel.

The three tests share a page, not a system. Testosterone, cortisol, and prolactin are produced in different places, follow different rhythms, and are read against different kinds of ranges.

## What the panel measures

Hormones are signalling molecules, and the panel groups three that come from different systems. Testosterone is a sex hormone, cortisol is produced by the adrenal glands and follows a daily rhythm, and prolactin is produced by the pituitary gland. They are not read as one axis.

A total hormone result includes the fraction bound to carrier proteins and the free fraction. Some reports also print free or bioavailable estimates, which are calculated from the total value and a binding protein. The report should say which measurement it used.

## The tests inside it

| Test | Also printed as | Unit | What it reflects |
| --- | --- | --- | --- |
| [Testosterone](https://doctano.com/tests/testosterone) | Total testosterone, T | ng/dL, nmol/L | The total concentration in serum, including the bound and free fractions. |
| [Cortisol](https://doctano.com/tests/cortisol) | Serum cortisol, cortisol (AM), cortisol (PM) | ug/dL, nmol/L | The total cortisol concentration at the collection time. |
| [Prolactin](https://doctano.com/tests/prolactin) | PRL, serum prolactin | ng/mL, ug/L | The prolactin concentration in serum. |

[PSA](https://doctano.com/tests/psa) is often ordered in men's health packages and can appear near these tests, but it is a protein made by prostate tissue, not a hormone. It is a related measurement rather than a member of the panel.

## Why this page does not print a range

Hormone ranges are tied to the sample. Cortisol is read against a range for the collection time, testosterone against a range for sex and age, and prolactin against a range that may depend on the method and the conditions of the draw. Assays differ between laboratories, and so do the units.

The range printed on the report that produced your value is the one that applies. Doctano keeps that printed range with the result. It does not replace it with a general range from the internet, because a number without its time, sex, age, and method is not the same result.

## What moves together

Timing matters. Cortisol follows a daily rhythm, and a sample taken in the morning is not read against the same range as one taken later. Prolactin can rise with sleep, stress, a recent meal, or the effort of the draw. Testosterone has its own variation through the day.

Pulsatility matters. Hormones are released in bursts, so two samples taken close together can differ. A single result is a snapshot, and a clinician may read it with a repeat sample.

Binding proteins matter. A total testosterone result includes the hormone bound to carrier proteins and the free fraction. A change in a binding protein can move the total without changing the free fraction, and some reports print calculated free or bioavailable estimates.

Medicines matter. Some medicines change hormone production, binding, or the assay itself. A clinician can say whether a medicine is relevant to a particular result.

Testosterone, cortisol, and prolactin are different axes. They are not three views of one system, and a change in one does not explain a change in another.

## How to read the report's own grouping

- **Read the order.** Testosterone, cortisol, and prolactin may be printed in one block or in separate sections with their own collection times. The report's labels are the guide.
- **Find the flags.** A flag compares the value with the range the laboratory printed for that test and, where relevant, that time, sex, and age. It is not a diagnosis.
- **Check the calculated values.** Free and bioavailable testosterone and some ratios are derived from total testosterone and binding proteins. The arithmetic can explain a result that looks out of place.
- **Check the units.** ng/dL and nmol/L for testosterone, and ug/dL and nmol/L for cortisol, are different scales. The numbers are not the same on different scales.
- **Check the timing and collection.** A cortisol line may be labelled AM or PM, and a prolactin note may mention rest before the draw. The time is part of the result.
- **Read the remarks.** A comment about the draw time, stress, or a repeat can explain a value that sits away from the rest.

## What a flagged result means, and what it does not

A flag means the value sits outside the range the laboratory printed for that test and, where relevant, that time, sex, and age. It does not diagnose a condition. A single hormone result can be moved by the time of the draw, stress, sleep, a recent meal, a binding protein, or a medicine.

A value inside the printed range is not proof that nothing is wrong. The range describes a reference group, and hormones vary between people and within one person. The trend and the collection conditions are often more useful than one snapshot.

## The cross-year view

Hormone results are more useful as a series than as a single panel. Compare the same hormone, in the same unit, from the same laboratory where possible, and compare samples collected at a similar time of day. A cortisol result from the morning and one from later in the day are not the same measurement.

Pulsatility means that two samples can differ without a meaningful change. A series collected under similar conditions is better evidence than a single snapshot, and the report's own notes about timing are part of the comparison.

Doctano keeps each result with its printed range and places it on the profile's timeline. Names and units are normalized across labs, so the same marker lines up across years, and every point still opens the report it came from. The trend is a prompt for a conversation, not a conclusion.

## What this page is not

This page explains the panel in general. It does not interpret your result, diagnose a condition, or recommend treatment. It is not medical advice. Verify the values and units against the original report, and discuss the result with a qualified professional.

## Hormone panel questions

**What is a hormone panel?**

It is a group of blood tests that measure hormones from different systems, usually testosterone, cortisol, and prolactin. Each is read on its own terms because each has its own rhythm, binding, and range.

**Why does the time of the blood draw matter?**

Cortisol follows a daily rhythm, and prolactin and testosterone can vary with sleep, stress, meals, and time of day. A result is read against a range for the collection time and conditions, which is why the report often prints the time.

**Is PSA part of a hormone panel?**

No. PSA is a protein made by prostate tissue, not a hormone. It is often ordered in men's health packages, so it may appear near these tests, but it is a separate measurement with its own page.

**Can one hormone result be trusted?**

A single result is a snapshot. Hormones can be pulsatile, and binding proteins and medicines can change what a total measurement means. A clinician often reads the result with the collection time, symptoms, other tests, and sometimes a repeat sample.

## Limits

**This is not a diagnosis.** A hormone panel is read with the collection time, your history, other results, and the range printed on your report. Verify the values against the original report and discuss them with a qualified professional.

## Links

- [Homepage](https://doctano.com/)
- [Lab report tracker](https://doctano.com/lab-report-tracker)
- [All panels](https://doctano.com/panels/)
- [Testosterone](https://doctano.com/tests/testosterone)
- [Cortisol](https://doctano.com/tests/cortisol)
- [Prolactin](https://doctano.com/tests/prolactin)
- [PSA](https://doctano.com/tests/psa)
- [Cardiac risk panel](https://doctano.com/panels/cardiac-risk-panel)
- [Urine routine](https://doctano.com/panels/urine-routine)
- [How to read a lab report](https://doctano.com/guides/how-to-read-a-lab-report)
- [All guides](https://doctano.com/guides/)