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Table 2 Abnormal karyotype distribution

From: Cytogenetic analysis of 3387 umbilical cord blood in pregnant women at high risk for chromosomal abnormalities

Abnormal karyotypesCases(n)(%)
Numerical abnormalities11965.38
 Trisomy 215932.42
 Trisomy 18179.34
 Trisomy 1321.10
 45,X21.10
 47,XXX52.75
 47,XXY73.85
 47,XYY63.30
 48,XXXX10.55
 Mosaic1910.44
Structural abnormalities6435.16
 Translocation158.24
 Inversion2614.29
Derivative chromosome73.85
 Deletion52.75
 Duplication10.55
 Additio52.75
 Marker chromosome31.65
 Others21.10
 Total182100.00