Methods Cordocenteses were performed in 7 fetuses with pleural effusion and then chromosomal karyotypes,TORCH,hemoglobin electrophoresis and blood groups were analyzed.

• 方法对7例患有胸腔积液的胎儿抽取脐静脉血行染色体核型、TORCH、血红蛋白电泳、血型等检查;