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Laboratory Test Reference Guide

Laboratory Information

Test Name

B-HCG (gestational)

External Price (excl. GST)

Price

$15.57

Specimen Collection

Specimen Collection and Transport Protocols

Beta HCG (for all males, and females with any clinical details other than routine pregnancy)

Adult Specimen

Heparin (light green), SST(gold), "T-" labs SST (gold)

Paediatric Specimen

0.4ml Heparin (light green) or Plain(red).

Sample Delivery to Lab

Room temperature

Test Information

Department

Biochemistry

Test Availability

Mon - Sun, 24hrs

Laboratory Turnaround Time

3hrs or1 hr urgent request.

Method

Cobas 600 ECLIA "T" labs Elecsys 2010 ECLIA

Unit Of Measurement

IU/L

Reference Interval

Normal (non-pregnant) < 5 IU/L.
Confirmation of pregnancy > 25 IU/L.
Patients with levels between 5 - 25 should be retested in 24 - 48 hours
Approximate levels in early pregnancy.
Weeks post LMP  
  4 weeks           3 - 426          IU/L
  5 weeks         19 - 7340        IU/L
  6 weeks     1080 - 56500     IU/L
 10 weeks  54100 - 288000   IU/L

In the normal early pregnancy levels should rise by 65% each 48 hours, or 114% over 72 hours
B-hCG values generally peak during the first trimester and decline slowly through the remainder of the pregnancy.
A sharply reduced or falling level may indicate an abnormal pregnancy.
Menopausal women may have levels upto 14  IU/L, but if level is >5 repeat and also ask for an FSH level .

Uncertainty Of Measurement

10%

Minimum Volume

0.2 mL heparin plasma or serum.

Electronic Information

Registration Code

HCG

HL7Mapping Code

$HCG

LOINC Code

21198-7