Morphological and biochemical variations in the skin of Rana esculenta during the annual cycle.
D000818:Animals; D002369:Castration; D004958:Estradiol / Q000494:pharmacology; D005260:Female; D008297:Male; D011893:Rana esculenta / Q000033:anatomy & histology*; D012621:Seasons; D012727:Sex Characteristics; D012867:Skin / Q000166:cytology*; D013739:Testosterone / Q000494:pharmacology
D013739:Testosterone; D004958:Estradiol