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HelpTest Code ANT1 Antenatal Screen
Specimen Requirements
Submit only one of the followings:
ABO Group and Rh Type (ABORh)
Preferred
Specimen Type: Whole Blood
Container/Tube: EDTA Lavender Top
Volume: 3.0 mL
Minimum Volume: 3.0 mL whole blood
Acceptable
Specimen Type: Whole Blood
Container/Tube: EDTA Pink Top
Volume: 6.0 mL
Minimum Volume: 6.0 mL whole blood
HBsAg, Anti-HBs, Syphilis Ab, Anti-HIV Ag-Ab, VZG
Specimen Type: Serum
Container/Tube: Gold Top (SSTII) / Red Top
Volume: 5.0 mL / 6.0 mL blood
Minimum Volume: 1.0 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs
Urine Formed Elements (UFE)
Specimen Type: Early morning first void urine collection without preservatives
Container/Tube: Screw Capped sterile urine container.
Volume: 100.0 mL
Minimum Volume: 20.0 mL urine
Collection Instructions: Send specimen to the laboratory immediately
Full Blood Count (FBC)
Specimen Type: Whole Blood
Container/Tube: Lavender Top (EDTA)
Volume: 3.0 mL whole blood
Minimum Volume: 1.5 mL whole blood
Collection Instructions: Send whole blood specimen to the laboratory immediately
Specimen Stability
ABO Group and Rh Type (ABORh)
Samples are kept for 14 days. Test best performed on fresh drawn samples
HBsAg, Anti-HBs, Syphilis Ab, Anti-HIV Ag-Ab, VZG
| Specimen type | Serum |
|---|---|
| Ambient | 24 hours |
| Refrigerate | 6 days (preferred) |
| Frozen | 8 months |
Urine Formed Elements (UFE)
| Specimen type | Urine |
|---|---|
| Ambient | 2 hours |
| Refrigerate | 1 day |
| Frozen | Not acceptable |
Full Blood Count (FBC)
| Specimen Type | Whole Blood |
|---|---|
| Ambient | 8 hours |
| Refrigerate | 1 day |
| Frozen | Not acceptable |
Panel Information
Panel includes the following tests:
Methodology
See individual test listings for methodology
Days and Times Performed
| ABO Group and Rh Type (ABORh) | 24 hrs, TAT 1 day |
|---|---|
| HBsAg, Anti-HBs, Syphilis Ab, Anti-HIV Ag-Ab | Monday through Friday, TAT 1 - 3 days |
| Varicella Zoster IgG (VZG) | Tuesday, Friday, TAT 2 - 5 days |
| Urine Formed Elements (UFE) | 24 hrs, TAT 1 day |
| Full Blood Count (FBC) | Monday through Sunday, TAT 1 day |
Specimen Condition
ABO Group and Rh Type (ABORh)
| Haemolysis | Gross Invalidate Result |
|---|---|
| Icterus | Not applicable |
| Lipaemia | Not applicable |
| Others: Insufficient specimen | Reject |
HBsAg, Anti-HBs, Syphilis Ab, Anti-HIV Ag-Ab, VZG
| Gross Haemolysis | Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Urine Formed Elements (UFE)
| Haemolysis | Not applicable |
|---|---|
| Icterus | Not applicable |
| Lipaemia | Not applicable |
| Others | Not applicable |
Full Blood Count (FBC)
| Haemolysis | Not applicable |
|---|---|
| Icterus | Not applicable |
| Lipaemia | Not applicable |
| Others: Clotted, insufficient specimen | Reject |
Reference Interval
See individual test listings for reference interval
Reflex Testing
Hepatitis B Surface Antigen, qualitative (HBsAg)
Samples reactive for HBsAg are confirmed by HBsAg (Confirmation).
Samples reactive for HBsAg are tested by a reflex test, Hepatitis B e Antigen (HBeAg)
Syphilis Ab
Samples reactive for Syphilis Ab are confirmed by supplemental test Treponema pallidum Passive Particle Agglutination (TPPA) Assay.
Samples reactive for TPPA are tested by a supplemental test Rapid Plasma Reagin (RPR) to confirm an acute syphilis.
Testing Laboratory
| ABO Group and Rh Type (ABORh) | National University Hospital Transfusion Services, 67722305 |
|---|---|
| HBsAg, Anti-HBs, Syphilis Ab, Anti-HIV Ag-Ab, Varicella Zoster IgG (VZG), Urine Formed Elements (UFE) | National University Hospital, Singapore Clinical Chemistry, 67724346 |
Useful For
| ABO Group and Rh Type (ABORh) | Determine ABO and Rh (D) blood group |
|---|---|
| HBsAg, Anti-HBs, Syphilis Ab, Anti-HIV Ag-Ab, VZG, UFE | Blood tests to evaluate and prepare for a healthy pregnancy. |
Service Code
34013
LOINC Code Information
See individual test listings for LOINC code information
Update
Last updated 21/02/2025