Characterization of the kallikrein-kinin system during the bovine ovulation process

► Kallikrein-kinin system is produced in the ovary during ovulation in bovine. ► Bradykinin and kallikrein have a regulation in follicular fluid during ovulation. ► The B1R expression is induced in both follicular cells. ► The B2R is constitutively expressed in granulosa cells and induced in theca cells. ► The study uses an in vivo approach to study monovulatory species.