Prolactin

Macroprolactin, Luteotropin
Core Laboratory & Transfusion Medicine
Biochemistry
Blood
PRL2, PRLP2

Macroprolactin: PPRL, PPRLP

Assisting in the diagnosis of anovular cycles, hyperprolactinemic amenorrhea, galactorrhea, gynecomastia, azoo-spermia and evaluating pituitary tumors.

Macroprolactin can be used to determine biologically active levels of prolactin in cases of discordant

Serum, Plasma

0.5 mL

Serum (Gold SST)
Plasma (Light Green PST)
Collection Containers – Tube Types

4.5 mL


Room Temperature: N/A
Fridge: 14 days @ 2-8°C
Freezer: 6 months @ -20°C


Roche cobas e 602, immunoassay

24 hours a day, 7 days a week

1 hour

3 hours

Females: 5 - 23 ug/L
Males: 4 - 15 ug/L

In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.

416-586-4800 extension 4688

Contact the on-call Biochemist through Locating to request macroprolactin testing. Macroprolactin will be approved when prolactin levels are > 38 ug/L in females and > 25 ug/L males. Values below this will not be approved for macroprolactin evaluation due