Effect of treatment with human chorionic gonadotropin on day 5 after timed artificial insemination on fertility of lactating dairy cows - Nascimento, A. B; Bender, R. W; Souza, A. H; Ayres, H; Araujo, R. R; Guenther, J. N; Sartori, Roberto; Wiltbank, M. C (Journal of Dairy Science, 2013)