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病例:孕妇,24岁,第1胎妊娠,孕25+5周,常规超声检查。超声显示:宫内单胎,颅骨光环完整,脊柱排列整齐、连续,心脏四腔心显示良好,腹部未见异常。最大羊水无回声区5.4 cm,羊水回声清晰。胎盘位于子宫左侧壁。左侧股骨长4.2 cm,右侧股骨长2.1 cm,明显弯曲,呈“电话筒”征。上肢肱骨
Case: pregnant women, 24 years old, the first pregnancy, 25 +5 weeks pregnant, routine ultrasound. Ultrasound showed that: a single intrauterine, complete aura of skull, spinal alignment, continuous, heart four heart showed good, abdomen no abnormalities. The largest amniotic anechoic area 5.4 cm, amniotic fluid echo clear. The placenta is located on the left side of the uterus. The left femur is 4.2 cm long and the right femur is 2.1 cm long. It is obviously curved and presents as a “telephone tube” sign. Upper extremity humerus