The horse feto-placental unit.
In the pregnant mare two different groups of oestrogens are produced by the placenta. The precursor of "classical" oestrogens (oestrone, oestradiol-17 beta and oestradiol-17 alpha) is dehydroepiandrosterone which originates from the fetal gonads. The ring B unsaturated oestrogens (equilin and equilenin and their derivatives) derive from farnesyl pyrophosphate by a pathway not involving cholesterol.
Möstl
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Institut für Biochemie, Veterinärmedizinische Universität Wien, Osterreich.
D000818:Animals; D004967:Estrogens / Q000378:metabolism; D005260:Female; D005865:Gestational Age; D006736:Horses / Q000196:embryology* / Q000378:metabolism; D010920:Placenta / Q000378:metabolism*; D011247:Pregnancy
D004967:Estrogens