Pathway of the formation of estriol in the fetoplacental unit.
D000738:Androsterone / Q000096:biosynthesis; D002247:Carbon Isotopes; D004958:Estradiol / Q000096:biosynthesis; D004964:Estriol / Q000096:biosynthesis*; D004970:Estrone / Q000096:biosynthesis; D005260:Female; D006801:Humans; D010920:Placenta / Q000378:metabolism*; D011247:Pregnancy; D013431:Sulfates; D014316:Tritium
D002247:Carbon Isotopes; D013431:Sulfates; D014316:Tritium; D004970:Estrone; D004958:Estradiol; D000738:Androsterone; D004964:Estriol