Fetal chromosomal examination helps screen fetal chromosomal abnormalities prenatally.Diagnosis of such anomalies allows pregnancy termination, but causes tremendous trauma during pregnancy.

• 产前之胎儿染色体检查，虽可协助妇女在产前筛检出异常的胎儿，并依诊断行终止妊娠，但却迫使妇女在平静的孕程中，突然遭遇重大的冲击。