Information on collection, storage, and volume
Amniotic fluid, direct and cultured cells, or chorionic villus (CVS) direct and cultured cells
15 mg CVS, one T-25 confluent flask of fetal cells or 10 mL amniotic fluid
Amniotic fluid: Orange-top polypropylene tube CVS: Laboratory-provided screw-top tubes with sterile transport medium
Maintain specimen at room temperature or refrigerate.
Prenatal: Call a laboratory genetic coordinator prior to obtaining any specimens. All prenatal specimens (including cord blood) must be accompanied by a maternal blood specimen for analysis of possible maternal cell contamination.
Amniotic fluid: Discard first 2 mL, then collect 10 mL in 15-mL orange-top polypropylene tube. Additional specimen must be obtained for back-up culture at a LabCorp cytogenetics laboratory or another facility.