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Economic benefit in repeat breeder cows using intrauterine infusion of penicillin and estrus synchronization followed by timed artificial insemination. J. Adv. Vet. Anim. Res [Internet]. 2018 Dec. 29 [cited 2026 Jul. 3];5(4):454-8. Available from: https://www.banglajol.info/index.php/JAVAR/article/view/39511