The requirement of GnRH at the beginning of the five-day CO-Synch + controlled internal drug release protocol in beef heifers1

• Published in: Journal of animal science Vol. 92; no. 9; pp. 4198 - 4203
• Main Authors: Cruppe, L. H., Day, M. L., Abreu, F. M., Kruse, S., Lake, S. L., Biehl, M. V., Cipriano, R. S., Mussard, M. L., Bridges, G. A.
• Format: Journal Article
• Language: English
• Published: Champaign Oxford University Press 01.09.2014
• Subjects: Animal reproduction; Cattle; Hormones

The objective of this study was to determine if the omission of GnRH at controlled internal drug release device (CIDR) insertion would impact pregnancy rates to timed AI (TAI) in beef heifers enrolled in a 5-d CO-Synch + CIDR protocol that used 1 PGF2... dose given at CIDR removal. Yearling beef hei...