Pierrepoint, C G Patterns of steroid biosynthesis in the gonads of freemartins and their male co-twins. [electronic resource] - Journal of reproduction and fertility. Supplement May 1969 - Suppl 7:63-72 p. digital Publication Type: Journal Article ISSN: 0449-3087 Subjects--Topical Terms: 17-Ketosteroids--biosynthesisAndrogens--biosynthesisAndrostanes--biosynthesisAnimalsCattleEstrogens--metabolismFemaleFreemartinism--metabolismGonadal Steroid Hormones--biosynthesisGonads--metabolismIn Vitro TechniquesMaleOvary--metabolismPregnancyPregnenolone--metabolismProgesterone--metabolismTestis--metabolismTestosterone--biosynthesisTwins