| L/S | lactase/sucrase [ratio]; lecithin/ sphingomyelin [ratio]; lipid/saccharide [ratio]; longitudinal section; lumbosacral |
|---|---|
| L/S ratio | Lecithin/Sphingomyelin > 2이나 IRDS가 오는 경우 1. DM Mother 2. Erythroblastosis Fetalis 3. Metabolic Disease of Fetus 4. Deficit of Phosphatidylglycerol |