Prenatal SNP Array | KK Women's and Children's Hospital

Specimen Container	Original syringe or Sterile tissue culture grade container, EDTA tube
Specimen Requirement	1. Amniotic Fluid (AF) = GA < 16 weeks: 30ml (No direct extraction. Sample will be cultured) = GA > 16 weeks: 30ml (10ml taken using 10ml syringe for direct extraction) 2. 3ml Whole blood EDTA tube from mother. Sterile technique must be observed.
Specimen Storage/Transport	Store at room temperature and transport to laboratory as soon as possible.
Orderable as Urgent?	No
Turn Around Time	21 days
Testing Laboratory Location	KKH
Laboratory	Cytogenetics
Contact Number	6394 1392
Day and Time Performed	Mon – Fri: By appointment. For KKH, appointment to be made with ADC
Orderable on CPOE?	No
Downtime Form	Lab Cytogenetics
Additional Information	Consent required. Please fill up Consent form for “Prenatal Chromosome Microarray Analysis” [85060-FM-MB-104]. = AF specimens cultured beyond 3 weeks old may yield uninterpretable results. = Suboptimal specimens likely to cause longer Turn Around Times - AF sample collected <16 weeks (tiny pellet) or > 26 weeks - AF sample <15ml volume - Bloody or discoloured AF sample