Test Details: This panel helps in aneuploidy detection for chromosomes 13 and 21. Autosomal monosomies are usually not compatible with life. Autosomal trisomy of chromosomes 13 and 21 are most common trisomy detected in live births. Trisomy 21 is associated with Down Syndrome and is the single most common known cause of mental retardation. Trisomy 13 is associated with Patau Syndrome. Prenatal Diagnosis of cord blood cells is an effective and safe prenatal screening method for trisomy 21 and 13 in the average-risk or general population.