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