A type of growth interference that begins later in pregnancy in which cell size is affected and that is usually associated with compromised uteroplacental blood flow is known as:
a. Symmetric
b. Asymmetric
c. Retardation
d. Modification
ANS: B
Growth interference that begins later in pregnancy and affects the size of cells, not the total number of cells is asymmetric intrauterine growth restriction (IUGR). It is most often associated with compromise of uteroplacental blood flow. Causes of asymmetric IUGR include gestational hypertension, smoking (causing vasoconstriction), maternal drug use (such as cocaine), uncontrolled maternal diabetes, and placental infarcts.
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