Table 2. Maternal age-specific distribution of women with increased nuchal translucency thickness.

Maternal age	Number	Percentage (%)	Number of chromosomal aberrations	Percentage of chromosomal aberrations (%)
≤ 19	43	1.6	8	18.6
20-24	441	16.2	79	17.9
25-29	1042	38.3	172	16.5
30-34	752	27.6	132	17.6
35-39	326	12	111	34
≥ 40	116	4.3	58	50
Total	2720	100	560	20.6