Specimen Requirements: Adult: 5 cc whole blood in a green top tube (sodium heparin) plus 10 cc in a purple top tube (EDTA).

Pediatric: 2 cc whole blood in a green top tube (sodium heparin) plus 2 cc in a purple top tube. (EDTA).

Refrigerate specimen until shipment.

Turn Around Time:14 days

DNA Study Only (Previous Chromosome Study Required):

Southern Blot determination of Fragile X mutation

Specimen Requirements: Adult: 10 cc whole blood in a purple top tube (EDTA).

Pediatric: 2 cc whole blood in a purple top tube (EDTA).

Refrigerate specimen until shipment.

Turn Around Time:7-10 days