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The horse feto-placental unit
1Institut für Biochemie, Veterinärmedizinische Universität Wien, Osterreich.
Experimental and Clinical Endocrinology
|January 1, 1994
Abstract:
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.