title: Attack directed by groups of castrated male mice towards lactating or non-lactating intruders: a urine-dependent phenomenon?
mesh_terms: D000374:Aggression / Q000502:physiology*; D000818:Animals; D002369:Castration; D005260:Female; D006801:Humans; D007774:Lactation; D008297:Male; D051379:Mice; D011247:Pregnancy; D013997:Time Factors; D014556:Urine / Q000502:physiology*