Male animal female male 606 Female 584 Animals 574 article 294 physiology 258 Argentina 204 nonhuman 192 genetics 172 growth, development and aging 168 controlled study 146 metabolism 142 Article 126 classification 118 adult 108 animal experiment 100 priority journal 96 histology 90 anatomy and histology 88 human 88 parasitology 86 Humans 68 body size 64 Ecosystem 60 ecosystem 60 animal tissue 58 mouse 58 Hexapoda 56