Table 2.

Test cancelations

Total samples processed in CLIA laboratory, N	6123
Total cancelations, n (%)	149 (2.4)
Administrative cancelations, n	106
Inadequate blood volume	43
Improper labeling or unlabeled	26
Canceled test by physician or patient	15
Gestational age less than 10 weeks 0 day	9
Sample received beyond stability or compromised in transit	5
Sample from multiple gestation	4
Duplicate sample	3
Wrong sample type	1
Technical cancelations, n	43
Interfering substance present	33
Unable to extract sufficient DNA	10

CLIA, Clinical Laboratory Improvement Amendments.