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  • Clinical chemistry reagents intended to perform quantitative chemical analyses of body fluids (typically amniotic fluid) to determine the ratio of lipid lecithin (phosphatidylcholine) to sphingomyelin (L/S ratio). Sphingomyelin is a lipid derived from nonlung sources that is used as a marker against which lecithin is measured. An L/S ratio of 2.0 or greater in an amniotic fluid sample is considered a measure of fetus lung maturity.
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