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Subscribe:Subscribe to American Journal of Obstetrics & Gynecology
- Surfactants, L/S ratio, amniotic fluid optical density and fetal pulmonary maturity.J. Reprod. Med. 1982; 27: 34
- Assessment of fetal lung maturity: A comparison of the lecithin/sphingomyelin ratio and the tests of optical density at 400 and 650 nm.Am. J. Obstet. Gynecol. 1979; 134: 528