II. Landmarks

  1. Thalamic nuclei
  2. Cavum septi pellucidi

III. Technique

  1. Oval shape
  2. Leading edge to leading edge

IV. Images

V. Hints

  1. Avoid too much abdominal pressure
  2. Look for Symmetric Intracranial Anatomy
  3. Look for X

VI. Accuracy

  1. At 20 weeks gestation: accuracy within 1 week

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