| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
PREGNANCY, SERUM QUANTITATIVE
Test CodeAlias/See Also
CPT Codes
84702
Preferred Specimen
1 Gold tube (gel separator)
Minimum Volume
0.5 mL
Other Acceptable Specimens
Instructions
Centrifuge for complete separation of serum and red cells. If serum seperator tube is not used, transfer (aliquot) serum into a transfer tube. Refrigerate until tested.
Transport Temperature
Refrigerate
Specimen Stability
15-30°C up to 8 hours; 2-8°C up to 2 days; Frozen up to 6 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis interferes
Gross lipemia interferes
Gross icterus interferes
Methodology
Chemiluminescence
Setup Schedule
M, T, W, Th, F, Sa, Su
Report Available
Reference Range
Males: <0.5 - 2.67 mIU/mL
Non-pregnant Females: <0.5 - 4.90 mIU/mL
Pregnant Females:
- Negative <0.5 mIU/mL
- Indeterminant 5 - 25 mIU/mL
- Positive >25 mIU/mL
Estimation of Gestational Age
| Weeks from LMP | ßhCG mIU/mL |
|---|---|
| 3 | 5 - 50 |
| 4 | 5 - 426 |
| 5 | 18 - 7,340 |
| 6 | 1,080 - 56,500 |
| 7-8 | 7,650 - 229,000 |
| 9-12 | 25,700 - 288,000 |
| 13-16 | 13,300 - 254,000 |
| 17-24 | 4,060 - 165,400 |
| 25-40 | 3,440 - 117,000 |
The ranges in the table above have not been validated by the testing lab or assay manufacturer, but are provided solely as an estimate of gestational age. ßhCG levels can vary widely between pregnant women; therefore results should be used in conjunction with other methods (i.e. ultrasound, LMP) for determining gestational age. For assessment of gestational viability, serial testing is advised rather than a single measurement.
Clinical Significance
Intended for use as an aid in early detection of pregnancy. During pregnancy, rapidly declining levels may indicate an abnormal condition such as ectopic pregnancy or impending spontaneous abortion.
Performed By
Alverno Laboratories
Performing Laboratory
Alverno Central Lab
NCHB2 (Chemistry, Beckman DxI)
Last Updated: June 4, 2023
