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Fetal Biparietal diameter

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Fetal Biparietal diameter

  • Landmarks
  1. Thalamic nuclei
  2. Cavum septi pellucidi
  • Technique
  1. Oval shape
  2. Leading edge to leading edge
  • Images
  1. ObUltrasoundBiparietalDiameter.gif
  2. ObUltrasoundBiparietalDiameter.jpg
  • Hints
  1. Avoid too much abdominal pressure
  2. Look for Symmetric Intracranial Anatomy
  3. Look for X
  • Accuracy
  1. At 20 weeks gestation: accuracy within 1 week