[PS23] 23. Reproduction: Dairy

[RE-P11] SYNCHRONIZATION WITH A 5-DAY PROGESTERONE RELEASING INTRAVAGINAL DEVICE SYNCH PROTOCOL FOR FIRST AI DECREASED THE AGE AT FIRST CALVING AND THE REARING COSTS IN HOLSTEIN DAIRY HEIFERS

Paulo D. Carvalho², Vanda G. Santos², Bruno Carneiro³, Carolina Maia³, Alessio Valenza¹, Pedro Pinho¹, 〇Federico Randi¹, Paul Fricke² (1. CEVA Sante Animale, Libourne, France, 2. Deprment of Dairy Science, University of Wisconsin Madison, USA, 3. Diessen Servicios Veterinarios - Evora, Portugal)