Obstetrics Book

Developmental Disorder


Asymmetric IUGR

Aka: Asymmetric IUGR, Asymmetric Intrauterine Growth Retardation
  1. See Also
    1. Intrauterine Growth Retardation (IUGR)
    2. Symmetric Intrauterine Growth Retardation (Symmetric IUGR)
    3. Large for Gestational Age
  2. Epidemiology
    1. Represents 90% of Intrauterine Growth Retardation
    2. Occurs in third trimester
  3. Pathophysiology
    1. Results from placental insufficiency
    2. Intrauterine Growth Retardation with head sparing
    3. Severe Asymmetric IUGR may become Symmetric IUGR
    4. Chronic Fetal Hypoxia
  4. Causes: Utero-Placental Insufficiency
    1. Maternal Preeclampsia or Chronic Hypertension
    2. Gestational Diabetes (Second most common cause IUGR)
    3. Maternal Collagen Vascular Disease
    4. Maternal Tobacco Abuse
      1. Most common preventable cause of IUGR
      2. Birth weight reduced 200 grams if mother smokes
    5. Maternal Infection
  5. Complications
    1. Fewer neurologic complications than Symmetric IUGR
    2. Perinatal complications
      1. Polycythemia (hyperviscosity)
      2. Hypoglycemia

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