Objective: To explore the practical value of Down's screening and antenataldiagnosis in preventing and decreasing chromosomal disease and congenital birth defect.
目的：探讨唐氏筛查及产前诊断在预防和减少染色体病及先天缺陷儿出生的实用价值。
2
Antenataldiagnosis by Chorionic villus sampling can be done.
产前诊断由绒毛采样是可以做到的。
3
Conclusion: Antenatal fetal Dopler color ultrasonic in diagnosis of hydronephrosis and regular callback after birth should be effective method for screening fetal ureter obstruction.