Prolactin Blood Test in Croydon

What it measures

• Prolactin

Who it’s for

• Irregular or absent periods
• Difficulty conceiving
• Milky nipple discharge when not breastfeeding
• Low libido or erection problems in men

What raises prolactin

Prolactin naturally rises in pregnancy and breastfeeding. At other times, stress, intense exercise and some medicines (including certain antidepressants and anti-sickness drugs) can push it up, and so can an underactive thyroid. Less often, a small benign growth on the pituitary gland, called a prolactinoma, is the cause; it’s usually very treatable.

A raised result often needs repeating

Prolactin is so sensitive to stress that a mildly raised result is often repeated before anything else is done. Arrive in good time, sit quietly for a few minutes, and let us know if you feel anxious.

How to prepare

• Try to be relaxed and rested: stress, intense exercise and nipple stimulation in the hours before can raise prolactin.
• Stop biotin (vitamin B7) supplements, often found in hair, skin and nail products, 48 hours before.
• Drink a couple of glasses of water beforehand: it makes the sample quicker and easier to take.

How it works at our Croydon clinic

1. Book online

   Choose your test and a time that suits you. No GP referral needed.

2. A 15-minute visit

   A trained clinician takes a small blood sample at 169 Shirley Road, Croydon. Tell us if you’re nervous.

3. Results in 1–3 days

   A clear report showing each result against its reference range.

4. Next steps

   Share your report with your GP, who can arrange NHS follow-up if anything needs it.

Questions