title: The L-S ratio. Its use in the prediction of respiratory maturity in infants.
mesh_terms: D000305:Adrenal Cortex Hormones / Q000008:administration & dosage; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D005865:Gestational Age; D006801:Humans; D006819:Hyaline Membrane Disease / Q000209:etiology*; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases; D008168:Lung / Q000196:embryology; D010713:Phosphatidylcholines / Q000096:biosynthesis*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011663:Pulmonary Surfactants / Q000096:biosynthesis; D013109:Sphingomyelins / Q000096:biosynthesis*
chemical_list: D000305:Adrenal Cortex Hormones; D010713:Phosphatidylcholines; D011663:Pulmonary Surfactants; D013109:Sphingomyelins