title: A sexual transformation of the osseus bulla in duck embryos following administration of estrogen.
mesh_terms: D000818:Animals; D001768:Blister; D002605:Character; D004372:Ducks; D004967:Estrogens; D006801:Humans; D012723:Sex; D012725:Sexual Behavior
chemical_list: D004967:Estrogens
keywords: ESTROGENS/effects; SEX/characters