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The objective was to synchronize follicular wave emergence among cattle for synchronization of oestrus and ovulation, and to determine pregnancy rate after AI at observed oestrus. At random stages of the oestrous cycle, a controlled internal drug release device (CIDR-B) was inserted intravaginally...

Martinez, M. F.; Adams, G. P.; Kastelic, J. P.; Bergfelt, D. R.; Mapletoft, R. J.
Elsevier Science Inc., New York, USA
Theriogenology, 2000, 54, 5, pp 757-769