徐某,女,31岁,中孕,来我科作常规超声检查.仪器采用日本产东芝240型超声显像仪,探头频率3.75MHz.超声所见:胎头位于耻骨联合上,双顶径53mm,胸左右径33mm,腹左右径49mm,胎儿脐部膨出见一45×42mm球状物,周边有菲薄的膜包裹,内见细小均质光点,同胎儿肝脏回声一致,内可见一索状暗区与脐静脉回声一致,股骨长38mm,胎动和胎心反射正常, Xu, female, 31 years old, in pregnancy, to our department for routine ultrasound. Instruments used in Japan Toshiba 240 ultrasound imaging device, the probe frequency 3.75MHz. Sonography: fetal head located in the pubic symphysis, biparietal diameter 53mm, the chest diameter of about 33mm, the abdominal diameter of 49mm, fetal umbilical bulge to see a 45 × 42mm ball, surrounded by meager membrane wrapped, see the small homogeneous light spots, consistent with the fetal liver echo, a visible cable Shaped dark area consistent with the umbilical vein echo, femur length 38mm, fetal movement and fetal heart rate normal,