IUGR: phenotypes
pure symmetrical IUGR
- low profile IUGR
- proportionate reduction of all fetal measurements
- etiology:
- 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 fetal measurements due to
uteroplacental insufficiency with preferential shunting
of blood to fetal brain
- high HC (head circumference)/AC (abdominal circumference) and
FL (femur length)/AC ratios
see also: intrauterine growth retardation (IUGR)
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© 2002, C.E. Kahn, Jr.
2002-04-18