Objective: To assess the value of four-dimensional ultrasound in the diagnosis of surface deformity in fetus.
目的：探讨实时三维超声在诊断胎儿体表结构畸形中的临床应用价值。
Objective To evaluate the diagnostic value of two-dimensional ultrasound in fetus digestive system deformity and provide reference for the correct diagnosis of fetus digestive system deformity.
目的探讨二维超声对胎儿消化系统畸形的诊断价值，为正确诊断胎儿消化系统畸形提供参考。
Conclusions: That several organs of the fetus have not been developed belongs to rarely seen deformity.
结论：胎儿多器官未见发育，属罕见畸形。
The main causes of the death of one fetus in twin pregnancy were cord elements(5 cases), fetal deformity(3 cases), velamentous insertion(4 cases)and unknown etiology(15 cases).
双胎之一胎儿死亡主要原因：脐带因素5例、胎儿畸形3例、帆状胎盘4例、原因不明15例。
The main causes of the death of one fetus in twin pregnancy were cord elements(5 cases), fetal deformity(3 cases), velamentous insertion(4 cases)and unknown etiology(15 cases).
双胎之一胎儿死亡主要原因：脐带因素5例、胎儿畸形3例、帆状胎盘4例、原因不明15例。
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