Reproductive status and adrenal size in the northern red-backed vole in relation to season.
D000311:Adrenal Glands / Q000502:physiology*; D000818:Animals; D001835:Body Weight; D005260:Female; D006066:Gonads / Q000502:physiology; D008297:Male; D009929:Organ Size; D011247:Pregnancy; D012098:Reproduction / Q000502:physiology*; D012377:Rodentia; D012621:Seasons