| iugr: aetiology | <radiology> Uteroplacental insufficiency (80%), maternal causes, deficient supply of nutrients: smoking, malnutrition, multiple gestations, anaemia, high altitude, maternal vascular disease (more common): severe diabetes, primary placental causes, extensive placental infarctions, chronic partial separation, placenta previa primary fetal causes (20%), decreased intrinsic growth; symmetrical IUGR, congenital heart disease, genitourinary anomalies, CNS anomalies, chromsomal abnormalities (trisomy 13, 18, 21), viral infection (rubella, CMV) see also: intrauterine growth retardation (IUGR) (12 Dec 1998) |
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| iugr: phenotypes | <radiology> Pure symmetrical IUGR, low profile IUGR, proportionate reduction of all foetal measurements, aetiology: intrisic alteration in growth potential, severe nutritional deprivation overwhelming protective brain-sparing mechanism occuring prior to 26 weeks and persisting until delivery assymetrical IUGR, late flattening IUGR (75%), disproportionate reduction of foetal measurements due to uteroplacental insufficiency with preferential shunting of blood to foetal brain, high HC (head circumference)/AC (abdominal circumference) and FL (femur length)/AC ratios see also: intrauterine growth retardation (IUGR) (12 Dec 1998) |