Fetal Lung Maturity, Indicators

Phosphatidylglycerol (PG)

AFP (Alpha-fetoprotein)


Surfactant protein A (SP-A)

Although thyroid hormones are important in fetal lung maturation, measurement of thyroxine in the amniotic fluid is of limited or no value as a marker of fetal lung maturity. Because the placenta is largely impermeable to the thyroid hormones, the concentration of thyroid hormones in the amniotic fluid is limited.

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