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Macroprolactin and Prolactin, Serum/Plasma

Test ID: MPROL SP
Test
Specimen
Performance / Interpretation
Interface / Setup

Test

Method

Immunoassay with PEG precipitation

Report Includes

Prolactin; Macroprolactin; Monomeric Prolactin

Specimens

Serum; Plasma (Li Heparin)

Test Version

1-Dec-2025

Specimen

Specimens

Serum; Plasma (Li Heparin)

Collection Containers

Gold top (clot activator & gel);Red top (no additive);Green top (lithium heparin)

Sample Volume

2.0 mL

Minimum Volume

1.0 mL

Collection & Handling

Handling Information

Separate within 2 hours of collection and split into two aliquots. Store and send frozen.

Stability

Ambient 8 hours
Refrigerated 2 days
Frozen 120 days

Additional Stability Information

Avoid repeated freezing and thawing.

Test Version

1-Dec-2025

Performance / Interpretation

Method

Immunoassay with PEG precipitation

Turnaround Time

7 days

Results

Name Units Reference Range Conversion Factor
Prolactin µg/L
  • 0 to < 30 days: 50.9 – 200
  • 30 days to < 1 y: 4.0 – 71
  • 1 to < 19 y: 3.2 – 18.5
  • Male, >=19 y: 2.6 – 18.0
  • Female Premenopausal (< 50 y): 3.3 – 26.7
  • Female Postmenopausal (>= 50 y): 2.7 – 19.6
Monomeric Prolactin ug/L
  • 0 to < 30 days: 50.9 - 200.0
  • 30 d to < 1 yr: 4.0 – 71.0
  • 1 to < 19 yr: 3.2 – 18.5
  • 19+ Male: 2.6 – 18.0
  • 19+ Female: Premenopausal (< 50 yr): 3.3 – 26.7 ug/L
  • 19+ Female: Postmenopausal (≥ 50 yr): 2.7 – 19.6 ug/L
Macroprolactin Fraction
  • Normal: 40%
  • Borderline: 40-60%
  • Abnormal: 60%

Test Version

1-Dec-2025

Interface / Setup

HL7 Interface Codes

Order Code Result Codes Units
MPROL SP 28629Prolactin ug/L
66266Monomeric Prolactin ug/L
66265Macroprolactin %

Test Version

1-Dec-2025