Obstetrics Book


Fetal Biparietal diameter

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

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