Prolactin Test (PRL)
- Category
- Hormones
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 2 days
- Fasting
- No Fasting
- Age
- 10-60 Years
What Is This Test?
Measures prolactin, a pituitary hormone that stimulates breast milk production.
Why this test is performed?
High prolactin can cause irregular or absent periods, infertility, milky nipple discharge, low libido and erectile problems. Causes include pituitary tumours, some medicines and hypothyroidism.
Who should take this test?
Symptoms suggesting hormonal imbalance — weight change, fatigue, BP changes, growth problems — usually as advised by a doctor.
Test Preparation
No fasting is needed. Give the sample in the morning after resting for 15–20 minutes; avoid breast stimulation, intense exercise and stress before the test.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
Read our Editorial Policy and Medical Review Process.
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Frequently asked questions
Yes. Stress, sleep, exercise and a difficult blood draw can raise prolactin slightly, so a high value may be repeated.
No fasting is needed. Give the sample in the morning after resting for 15–20 minutes; avoid breast stimulation, intense exercise and stress before the test.
Blood sample taken from a vein in your arm.
Usually within 12–36 hours after the sample reaches the lab. You will receive the report online.
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