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Detection of congenital abnormality

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

Anomaly scans are performed between 18 +0 and 20+6 weeks of gestation.

The major abnormalities observed may be classed into:

  • defects of the central nervous system
  • heart defects
  • abdominal and thoracic wall defects
  • miscellaneous

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