The use of ultrasonography in the detection of birth defects The prenatal diagnosis of 21-trisomy and 18-trisomy by ultrasonograghyMeng Hua, Jiang Yuxin515-516
The application of Color Doppler Flow Imaging in the diagnosis of congenital cardiac diseaseDi Haiyan520-521
The ultrasonograghic diagnosis of fetal digestive system and anterior abdorminal wall defectsYing Weiwen, Yu Cheng523-525