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Zearalenone (ZEA) is a mycoestrogen found in diverse food and feed materials, particularly in corn and small grains. Following ingestion, the parent zearalenone is converted predominantly into α-zearalenol (α-ZOL) and β-zearalenol (β-ZOL) by hepatic hydroxy steroid dehydrogenases (HSD). The present study demonstrated by standard RT-PCR the expression of 3α- and 3β-HSD also in porcine cumulus oocyte...