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默沙东 诊疗手册

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Position and Presentation of the Fetus (1)
Position and Presentation of the Fetus (1)
Position and Presentation of the Fetus (1)

在妊娠晚期,胎儿移动至适于分娩的胎位。正常的胎位是胎儿颜面部朝后(朝向母体背部)、面部和躯体偏向一侧、颈部弯曲,先露部是头。

异常胎位是胎儿颜面部朝前,异常胎先露是面先露、额先露、臀先露和肩先露。