Animals Male animal male female 574 Female 552 article 462 physiology 444 nonhuman 384 metabolism 320 controlled study 308 genetics 244 Article 242 animal experiment 240 Argentina 228 priority journal 210 growth, development and aging 176 mouse 168 animal tissue 156 Mice 148 adult 140 classification 138 human 120 histology 116 anatomy and histology 114 animal cell 114 drug effects 114 drug effect 108 Humans 104 parasitology 94