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  • Title: Correlation between amniotic fluid optical density and L/S ratio.
    Author: Sbarra AJ, Michlewitz H, Selvaraj RJ, Mitchell GW, Cetrulo CL, Kelley EC, Kennedy JL, Herschel MJ, Paul BB, Louis F.
    Journal: Obstet Gynecol; 1976 Nov; 48(5):613-5. PubMed ID: 980289.
    Abstract:
    A test that circumvents the complex methodology needed for the determination of L/S ratios has been developed. It has been observed that the optical density, measured at 400 nm, of supernatants collected from fresh amniotic fluids centrifuged at 2000 g for 10 minutes correlates with L/S ratios.
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