Ordering Recommendation

Fetal genotyping for 35 red blood cell antigens and phenotypic variants to assess risk for alloimmune hemolytic disease. For parental or neonatal testing, refer to Red Blood Cell Antigen Genotyping (3001053). This test does not assess for RhD; to test for RhD, refer to RhD Gene (RHD) Copy Number, Fetal (3016640).

New York DOH Approval Status

This test is not New York state approved. ARUP cannot facilitate testing for New York state clients. Please work directly with a New York state-approved laboratory.

Specimen Required

Patient Preparation
Collect

Amniotic fluid
OR cultured amniocytes OR cultured CVS: Two T-25 flasks at 80 percent confluency.
AND whole blood for maternal cell contamination: lavender (K2EDTA), pink (K2EDTA), or yellow (ACD solution A or B).
If the client is unable to culture, order test Cytogenetics Grow and Send (ARUP test code 0040182) in addition to this test and ARUP will culture upon receipt (culturing fees will apply). If you have any questions, contact ARUP's Genetics Processing at 800-522-2787 ext. 3301.

Specimen Preparation

Amniotic fluid: Transport 10 mL amniotic fluid in a sterile container. (Min: 5 mL)
OR cultured amniocytes OR cultured CVS: Fill flasks with culture media. Backup cultures must be retained at the client's institution until testing is complete.
Whole blood for maternal cell contamination: Transport 3 mL whole blood (Min: 1 mL)

Storage/Transport Temperature

Amniotic fluid, cultured amniocytes or cultured CVS: CRITICAL TEMPERATURE. Must be received within 48 hours of shipment due to lability of cells.
Whole blood for maternal cell contamination: Refrigerated.

Unacceptable Conditions

Frozen specimens in glass collection tubes.

Remarks

The Patient History Form is available on the ARUP website or by contacting ARUP Client Services.

Stability

Fetal specimens: Ambient: 48 hours; Refrigerated: 48 hours; Frozen: Unacceptable
Whole blood for maternal cell contamination: Ambient: 72 hours; Refrigerated: 1 week; Frozen: 1 month.

Methodology

Polymerase Chain Reaction (PCR)/Fluorescence Monitoring/Fragment Analysis

Performed

Varies

Reported

3-10 days

Reference Interval

Interpretive Data

Refer to report

Compliance Category

Laboratory Developed Test (LDT)

Note

Hotline History

N/A

CPT Codes

0001U; 81265 Fetal Cell Contamination (FCC)

Components

Component Test Code* Component Chart Name LOINC
0050548 Maternal Contamination Study Fetal Spec 59266-7
0050612 Maternal Contam Study, Maternal Spec 66746-9
3001055 Rh Antigen C/c
3001056 Rh Antigen E/e
3001057 Rh Antigen V/VS
3001058 Kell Antigen K/k
3001059 Kell Antigen Kpa/Kpb
3001060 Kell Antigen Jsa/Jsb
3001061 Duffy Antigen Fya/Fyb
3001062 Kidd Antigen Jka/Jkb
3001063 MNS Antigen MN
3001064 MNS Antigen S/s/U
3001065 Lutheran Antigen Lua/Lub
3001066 Dombrock Antigen Doa/Dob
3001067 Dombrock Antigen Hy
3001068 Dombrock Antigen Joa
3001069 Landsteiner-Wiener Antigen LWa/LWb
3001070 Diego Antigen Dia/Dib
3001071 Colton Antigen Coa/Cob
3001072 Scianna Antigen Sc1/Sc2
3001073 Hemoglobin S Antigen
3016643 RBC Antigen Genotyping, Fetal Specimen 31208-2
3016644 RBC Antigen Genotyping Fetal, Interp 50398-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Colton genotyping (Coa, Cob)
  • Diego genotyping (Dia, Dib)
  • Dombrock genotyping (Doa, Dob, Hy, Joa)
  • Duffy genotyping (Fya, Fyb, Fyb-67C)
  • Kell genotyping (K, k, Kpa, Kpb, Jsa, Jsb)
  • Kidd genotyping (Jka, Jkb)
  • Landsteiner-Wiener genotyping (LWa, LWb)
  • Lutheran genotyping (Lua, Lub)
  • MNS genotyping (M, N, S, s, U, Uvar, Uneg)
  • Rh genotyping (C, c, E, e, V, VS)
  • Scianna genotyping (Sc1, Sc2)
Red Blood Cell Antigen Genotyping, Fetal