Fig. 1

The incidences of pathogenic and likely pathogenic chromosomal aberrations in pregnancies of AMA or NT ≥ 2.5 mm. (A) The relationship between age and pathogenic/likely pathogenic chromosomal abnormality rate; (B) The relationship between NT value and pathogenic/likely pathogenic chromosomal abnormality rate; (C) Pathogenic/likely pathogenic chromosomal abnormality rate in cases of single AMA or AMA combined another indicators; (D) Pathogenic/likely pathogenic chromosomal abnormality rate in cases of single NT ≥ 2.5 mm or NT ≥ 2.5 mm combined another indicators. *p<0.05