| Lecithin/Sphingomyelin Ratio (L/S) |
If the value is >2, it indicates fetal lung maturity |
| Phosphatidylglycerol (PG) |
Detection of PG in amniotic fluid indicates fetal lung maturity |
| Foam Test or Shake Test |
If both tubes have intact foam rings, it indicates fetal lung maturity |
| Creatinine |
≥176.8μmol/L indicates fetal kidney maturity |
| Bilirubin Substances |
△OD450 value <0.02 indicates fetal liver maturity |
| Amylase Value |
Iodine colorimetric method value ≥450U/L indicates fetal salivary gland maturity |
| Fat Cell Appearance Rate |
20% indicates fetal skin maturity |
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