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The lamellar body count compares favorably with traditional phospholipid testing in the prediction of fetal lung maturity. Phospholipid analysis is not needed with lamellar body counts greater than 30,000/microL or less than 10,000/microL, but may be of benefit for values in the intermediate risk range. Advantages of this test include speed, objectivity, small sample volume required, and universal availability of instrumentation.

The term "hydrophobicity" as used in this paper refers to the sum total of all such environmental effects on fluorescence. For a more complete discussion on hydrophobicity and solvent polarity the reader is referred to the recent review of Brand and Gohlke (1972).