Analysis of information sources in references of the Wikipedia article "Estrogenic substances" in English language version.
Complex Estrogenic Preparations. 1. Amniotin (Squibb). This is a highly purified but not crystalline preparation derived from pregnant mares' urine. The chief active ingredient is apparently ketohydroxyestrin (estrone).
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: ISBN / Date incompatibility (help)Amniotin, E. R. Squibb & Sons: This is an estrogenic preparation originally derived from amniotic fluid; it is not reduced to the crystalline state during manufacture. More recently, according to the firm, the urine of pregnant mares has served as an added source of active material.