Presynchronization using a modified Ovsynch protocol or a single gonadotropin-releasing hormone injection 7 d before an Ovsynch-56 protocol for submission of lactating dairy cows to first timed artificial insemination.
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M. Wiltbank | P. Fricke | P. Carvalho | M. C. Amundson | J. Guenther | M. Fuenzalida | P. D. Carvalho