“…It has been demonstrated repeatedly that chromatography on Sephadex LH-20 gives efficient separation of free, glucuronide-conjugated, monosulfated, and disulfated steroids (see Vihko, 1966;Jánne et al, 1969;Laatikainen et al, 1969;Laatikainen and Vihko, 1969). In this study, the free steroid fraction was further purified by solvent partition, silicic acid, and thin-layer chromatography.…”