Skip to main content

Table 2 Maternal age and karyotype of fetal chromosomal abnormality

From: Prenatal diagnosis of 4953 pregnant women with indications for genetic amniocentesis in Northeast China

Fetal chromosomal karyotype

Cases, n

≧40

35–39

30–34

25–29

< 25

Trisomy 21

143

26

31

37

36

13

Trisomy 18

33

9

5

3

14

2

XXX

10

0

2

3

5

0

Trisomy 13

6

1

2

0

2

1

Monosomy X

5

0

0

3

2

0

Sex chromosome mosaicism

3

0

0

1

1

1

XYY

2

0

2

0

0

0

XXY

2

0

0

1

1

0

Total

204

36

42

48

61

17