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孕妇23岁,孕1产0,孕25~(+2)周。孕期无物理化学及放射性物质接触史,无明显感冒及服用药物情况,夫妻双方无明显家族遗传史,常规产前检查:胎儿各生长径线与孕周相符,肝脏、胃泡位置正常,脐静脉腹内段向左侧弯曲走行,胆囊位于脐静脉左侧。脐带内仅见一条脐动脉及一条脐静脉。胎儿心脏超声:心脏位置、大小及连接未见异常,四腔心基本对称,各瓣膜结构、启闭未见异常,肺动脉与主动脉起源及内径未见异常,三血管气管切面升主动脉与肺动
Pregnant women 23 years old, pregnant and a 0, pregnant 25 ~ (+2) weeks. Pregnancy without physical chemistry and radioactive exposure history, no obvious cold and taking drugs, the husband and wife had no obvious family history, routine prenatal examination: fetal growth line and gestational age consistent with the normal liver, stomach bubble position, umbilical vein Abdominal segment to the left curved walk, the gallbladder is located in the left umbilical vein. Umbilical cord saw only one umbilical artery and a umbilical vein. Fetal heart ultrasound: cardiac position, size and connection no abnormalities, the basic four-chamber symmetry, the valve structure, opening and closing no abnormalities, the origin and diameter of the pulmonary artery and aorta were normal, the three tracheal ascending aorta and lung move