Animals Female animal 122 female 122 male metabolism Male 120 nonhuman 68 controlled study 61 physiology 54 priority journal 53 Article 50 genetics 42 animal experiment 40 adult 38 article 35 mouse 33 Mice 31 animal cell 31 animal tissue 31 gene expression 30 drug effects 29 cytology 26 protein expression 24 chemistry 20 reproduction 19 immunohistochemistry 18 unclassified drug 18 Cichlids 17 Reproduction 17