Spontaneous and induced ovulation in the lion (Panthera leo)

Abstract 10.1002/zoo.1430130403.abs The objective of this study was to clarify if ovulation occurs spontaneously, if it is copulation-induced, or if a combination of both mechanisms controls ovulation in African lions. Five female lions were either permitted unrestricted copulatory activity with vasectomized males throughout estrus or were physically isolated from conspecifies for the duration of estrus. […]