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Beaumont Laboratory

Zygosity Testing

Screen for Twin Zygosity


This test is not offered by Beaumont Laboratory, however, the Laboratory can facilitate specimen collection. Testing requires the ordering physician to complete all required forms from the independent clinical laboratory performing the testing. Please call the Sendout Laboratory at 248-551-9045 to request testing. Specimens received without the appropriate forms and information will not be shipped.

Specimen Collection Criteria


  • Adult: Four Lavender-top EDTA tubes or three Yellow-top ACD tubes.
  • Child: Two Lavender-top EDTA tubes or one Yellow-top ACD tube.
  • Prenatal: 10 mL amniotic fluid or one T-25 flask of confluent fetal cells.

Physician Office/Drawsite Specimen Preparation

Do not centrifuge. Maintain specimens at room temperature (20-26°C or 68-78.8°F) prior to transport.

Preparation for Courier Transport

Transport: 20 mL (adult) or 5-7 mL (children) whole blood, 10 mL amniotic fluid, or T-25 flask, at room temperature (20-26°C or 68-78.8°F).

Rejection Criteria

  • Specimens received without prior laboratory notification and review.
  • Specimens not collected and processed as indicated. 


Specimen Stability for Testing:

Send specimens to the Laboratory at room temperature (20-26°C or 68-78.8°F) immediately after collection.

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.


Sent to Integrated Genetics Westbourough, MA


Results available in 10-14 days.

CPT Code


Last Updated


Microtainer® and Vacutainer® are registered trademarks of Becton, Dickinson and Company.
UroVysion® is a registered trademark of Abbott Laboratories. ThinPrep® is a registered trademark of Hologic, Incorporated.

This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.