Article adult controlled study female metabolism Female 60 Animals 52 animal 52 nonhuman 52 priority journal 52 male 50 Male 42 animal experiment 36 human 36 Humans 34 animal cell 32 genetics 30 drug effects 28 animal tissue 26 protein expression 26 Adult 24 physiology 24 in vitro study 22 mouse 22 pathology 22 unclassified drug 22 Mice 20 Pregnancy 18 cytology 18 gene expression 18