Methods The OB ultrasound examinations of 136 cases with digestive tract abnormalities and 41 cases of abdominal wall defects were analyzed , those cases came from Alta Bates Perinatal Diagnostic center , Oakland, California USA during 5 years recently.

• 方法 对美国加州一产前诊断中心 5年中超声发现的13 6例消化道异常及 41例腹壁缺损的孕妇检查结果进行声像图特点分析。