Biogenesis of the estrogens:  the conversion of testosterone-4-C14 to estrone in the pregnant mare.
D000818:Animals; D003271:Contraceptive Agents, Female; D004967:Estrogens / Q000378:metabolism*; D004970:Estrone; D005260:Female; D006736:Horses; D006801:Humans; D050356:Lipid Metabolism; D011247:Pregnancy / Q000502:physiology; D013739:Testosterone / Q000502:physiology*
D003271:Contraceptive Agents, Female; D004967:Estrogens; D004970:Estrone; D013739:Testosterone
ESTROGENS/metabolism; PREGNANCY/physiology; TESTOSTERONE/physiology