Male animal female male 249 physiology Animals 241 Female 238 article 106 nonhuman 81 Argentina 73 controlled study 64 Article 60 metabolism 58 genetics 55 growth, development and aging 53 animal experiment 48 adult 46 reproduction 43 priority journal 41 Reproduction 39 sexual behavior 38 Sexual Behavior, Animal 34 anatomy and histology 32 histology 32 animal behavior 30 cytology 30 parasitology 30 classification 29 Hexapoda 26 human 26