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Good reasons to test
  • Irregular, absent, or very light periods
  • Galactorrhoea (nipple discharge outside of breastfeeding or pregnancy)
  • Fertility investigation

No fasting required. Mid-morning (2–3 hours after waking) — prolactin is highest during sleep and rises with stress; avoid vigorous exercise or breast stimulation before testing Results arrive in 3 to 5 business days, explained in plain language in your dashboard. Most results sit within the usual range - that is still useful, and anything unexpected supports a conversation with your healthcare practitioner.

Targeted Testing

Prolactin

A pituitary hormone involved in lactation and reproductive function

$65one-off, no subscription
  • NATA-accredited pathology
  • No GP referral needed
  • Results in 3 to 5 business days
  • Collect at 1,900+ centres

Why this test

Prolactin is one of the hormones a GP may check when looking into irregular periods or difficulty conceiving. A slightly raised result can be temporary, and is often rechecked before reading much into it.

Prolactin is produced by the pituitary gland and is best known for stimulating breast milk production. Outside of pregnancy and breastfeeding, elevated prolactin (hyperprolactinaemia) can suppress ovulation, cause irregular or absent periods, reduce libido, and in men, lower testosterone. Causes include certain medicines (such as some antipsychotic and anti-nausea medicines), prolactinomas (pituitary growths that are usually benign and often small), and an underactive thyroid. The stress of the blood test itself can also raise prolactin for a short time, so a mildly raised result is often repeated. Any decision about a medicine you take is one to make with your GP.

Understanding your results

Within reference range

Reference ranges vary by sex and lab — see your full report for lab-specific context

Below reference range

Very low prolactin is uncommon outside of certain pituitary conditions — discuss with your healthcare practitioner if unexpected

Above reference range

Elevated prolactin warrants further investigation to identify the cause — discuss with your healthcare practitioner

Reference ranges vary by laboratory and personal context. Your result is shown against the lab's range in your dashboard, alongside what it means.

How it works

1
TODAY
Order online

Pick a test or panel and check out. No GP referral, no waiting room.

2
THIS WEEK
One quick visit

Walk into one of 1,900+ NATA-accredited collection centres. A single blood draw is all it takes.

3
IN 3 TO 5 BUSINESS DAYS
Clear results

We translate your results into plain language in your dashboard - what each marker means, and what is in range.

4
ONGOING
Track over time

Retest when it matters and watch your trends, so you can see what is actually changing.

Yes. You can order the Prolactin test online from Clarity Labs without a GP referral. It's $65, collected at any of 1,900+ NATA-accredited centres across Australia, with results in 3 to 5 business days via your secure online dashboard.

The Prolactin test is $65 at Clarity Labs, a one-off price with no subscription or membership. That covers your pathology request form and collection at any of 1,900+ NATA-accredited centres nationwide.

Yes — physical stress (including venepuncture itself), poor sleep, and intense exercise can all transiently elevate prolactin. A mildly elevated result is often repeated under controlled conditions before further action is taken.

Many medications can raise prolactin, including antipsychotics, metoclopramide, domperidone, some antidepressants, and opioids. Let your healthcare practitioner know all medications you are taking.

No fasting is required. Avoid vigorous exercise and arrive relaxed — prolactin rises with stress and physical exertion.

If elevated, a repeat 4-6 weeks later under calm conditions is standard before further investigation (transient elevation from stress is common). If normal, repeat only if symptoms return or change.

NATA-accredited pathologyCollected through Sonic Healthcare1,900+ collection centresNo GP referral needed

Complete your health picture

Tests and panels that pair well with this one.

Male Hormones

A targeted panel for men to explore testosterone, related hormones, and prostate markers.

$249
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Female Hormones

A specialised panel for women to assess key reproductive hormones

$249
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This information is for general education and is not medical advice, diagnosis, or treatment. Results are best interpreted with a qualified healthcare practitioner in the context of your symptoms and history.

$65