Fetal or Placental Function
Urine estriol or total estrogens. Estriol is an estrogenic compound produced by the placenta from precursors derived from fetal adrenal cortex and fetal liver. Newly synthesized estriol is unconjugated; therefore, unconjugated estriol represents a product of the entire fetoplacental unit. The unconjugated estriol reaches maternal serum (where it has a half-life of about 20 minutes) […]