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Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Babies who are large for dates may be the result of:

  • inaccurate dating of last menstrual period
  • maternal diabetes - up to 80% of established cases
  • familial - i.e. everyone in the family is large
  • chromosomal defects
  • hydrops fetalis
  • Beckwith Wiedemann syndrome
  • Sotos' syndrome

Post-mature foetuses are not usually unduly large because placental insufficiency slows the rate of growth.

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