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Two-hundred and twenty-one (78 suckling - 40 to 90 days and 143 not suckling) Nelore (Bos taurus indicus) and crossbred Charolais (Bos taurus taurus) cows were used to evaluate the reutilization of progestagen implants to pharmacological control of the estrus cycle and ovulation on pregnancy rate....

Maluf, D. Z.; Pires, A. V.; Susin, I.; Moreira, R. J. de C.; Madureira, E. H.; Binelli, M.; Gonçalves, J. R.; Lima, L. G. de; Mendes, C. Q.; Biehl, M. V.
Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
Brazilian Journal of Veterinary Research and Animal Science, 2010, 47, 1, pp 38-46