From: The correlation between maternal age and fetal sex chromosome aneuploidies: a 8-year single institution experience in China
Age groups
No. of patients
45,X
47,XXY
Number/incidence
PPV
χ2
P
Number/Incidence
29–33
5097
12 (2.35)
1:426
8.432
0.004
8 (1.57)
1:637
9.198
0.002
34–38
6780
3 (0.44)
1:2272
33 (4.87)
1:205