Late onset IUGR

  • Late onset Intra Uterine Growth Restriction occurs after 32 weeks of gestation
  • It is usually caused by uteroplacental insufficiency
  • The various etiologies proposed in the development of delayed onset IUGR are:
    • hypertension
    • pre eclampsia
    • diabetes mellitus
    • maternal malnutrition
  • Late in pregnancy, the fetus grows mainly by cellular hypertrophy rather than hyperplasia and hence late onset IUGR is more amenable to therapy
  • The abdominal circumference will be much lower than normal as the deposition of glycogen in liver is impaired
  • The head circumference will be almost normal due to the brain sparing effect

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