To describe the etiology of isolated fetal ascites and associated perinatal outcomes, and to assess the progression of isolated fetal ascites to fetal hydrops.

中文翻译：

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孤立性胎儿腹水的病因和结局：系统评价。

描述孤立性胎儿腹水的病因和相关的围产期结局，并评估孤立性胎儿腹水向胎儿水肿的进展。