A single dose of FSH or hCG during a split-time AI program did not enhance follicular growth or pregnancy per artificial insemination in beef heifers

References

• Acosta T, Beg M, Ginther OJ. 2018. Effects of modified FSH surges on follicle selection and codominance in heifers. Anim. Reprod. 2:28–40.
   Google Scholar
• Anderson KJ, LeFever DG, Brinks JS, Odde KG. 1991. The use of reproductive tract scoring in beef heifers. Agri-Practice. 12:19–26.
   Web of Science ®Google Scholar
• Baruselli P, Sales JN, Sala R, Vieira L, Sá Filho M. 2012. History, evolution and perspect ives of timed artificial in semination programs in Brazil. Anim. Reprod. 9:139–152.
   Google Scholar
• Baruselli PS, Ferreira RM, Sá Filho MF, Bó GA. 2018. Review: using artificial insemination v. natural service in beef herds. Animal. 12:s45–s52. doi:10.1017/S175173111800054X.
   PubMed Web of Science ®Google Scholar
• Baruselli PS, Reis EL, Marques MO, Nasser LF, Bó GA. 2004. The use of hormonal treatments to improve reproductive performance of anestrous beef cattle in tropical climates. Anim Reprod Sci. 82-83: 479–486. doi:10.1016/j.anireprosci.2004.04.025.
   Google Scholar
• Beef reproduction task force. 2021. 2021 Estrus synchronization protocols for heifers and cows [WWW Document]. Beef Reprod. task force. https://beefrepro.org/wp-content/uploads/2020/12/Protocols-for-Sire-Directories-2021-Final.pdf (accessed 4.1.21).
   Google Scholar
• Bó GA, Baruselli PS. 2014. Synchronization of ovulation and fixed-time artificial insemination in beef cattle. Animal. 8:144–150. doi:10.1017/S1751731114000822.
   PubMed Web of Science ®Google Scholar
• Bó GA, Mapletoft RJ. 2020. Superstimulation of ovarian follicles in cattle: gonadotropin treatment protocols and FSH profiles. Theriogenology. 150:353–359. doi:10.1016/j.theriogenology.2020.02.001.
   PubMed Web of Science ®Google Scholar
• Bridges GA, Helser LA, Grum DE, Mussard ML, Gasser CL, Day ML. 2008. Decreasing the interval between GnRH and PGF2α from 7 to 5 days and lengthening proestrus increases timed-AI pregnancy rates in beef cows. Theriogenology. 69:843–851. doi:10.1016/j.theriogenology.2007.12.011.
   PubMed Web of Science ®Google Scholar
• Bridges GA, Mussard ML, Burke CR, Day ML. 2010. Influence of the length of proestrus on fertility and endocrine function in female cattle. Anim Reprod Sci. 117:208–215. doi:10.1016/j.anireprosci.2009.05.002.
   PubMed Web of Science ®Google Scholar
• Burns MG, Buttrey BS, Dobbins CA, Martel CA, Olson KC, Lamb GC, Stevenson JS. 2008. Evaluation of human chorionic gonadotropin as a replacement for gonadotropin-releasing hormone in ovulation-synchronization protocols before fixed timed artificial insemination in beef cattle1. J Anim Sci. 86:2539–2548. doi:10.2527/jas.2008-1122.
   PubMed Web of Science ®Google Scholar
• Cooke RF, Daigle CL, Moriel P, Smith SB, Tedeschi LO, Vendramini JMB. 2020. Cattle adapted to tropical and subtropical environments: social, nutritional, and carcass quality considerations. J Anim Sci. 98:1–20. doi:10.1093/jas/skaa014.
   Web of Science ®Google Scholar
• De Rensis F, López-Gatius F, García-Ispierto I, Techakumpu M. 2010. Clinical use of human chorionic gonadotropin in dairy cows: An update. Theriogenology. 73:1001–1008. doi:10.1016/j.theriogenology.2009.11.027.
   PubMed Web of Science ®Google Scholar
• Geary TW, Salverson RR, Whittier JC. 2001. Synchronization of ovulation using GnRH or hCG with the CO-synch protocol in suckled beef cows. J Anim Sci. 79:2536–2541. doi:10.2527/2001.79102536x.
   PubMed Web of Science ®Google Scholar
• Gonella-Diaza AM, Da Silva Andrade SC, Sponchiado M, Pugliesi G, Mesquita FS, Van Hoeck V, De Francisco Strefezzi R, Gasparin GR, Coutinho LL, Binelli M. 2015. Size of the ovulatory follicle dictates spatial differences in the oviductal transcriptome in cattle. PLOS ONE. doi:10.1371/journal.pone.0145321.
   Web of Science ®Google Scholar
• Gonella-Diaza AM, Mesquita FS, Lopes E, da Silva KR, Cogliati B, De Francisco Strefezzi R, Binelli M. 2018. Sex steroids drive the remodeling of oviductal extracellular matrix in cattle†. Biol Reprod. 99:590–599. doi:10.1093/biolre/ioy083.
   PubMed Web of Science ®Google Scholar
• Kasimanickam R, Hall JB, Currin JF, Whittier WD. 2008. Sire effect on the pregnancy outcome in beef cows synchronized with progesterone based Ovsynch and CO-synch protocols. Anim Reprod Sci. 104:1–8. doi:10.1016/j.anireprosci.2007.01.003.
   PubMed Web of Science ®Google Scholar
• Kasimanickam RK, Kasimanickam VR, Oldham J, Whitmore M. 2020. Cyclicity, estrus expression and pregnancy rates in beef heifers with different reproductive tract scores following progesterone supplementation. Theriogenology. 145:39–47. doi:10.1016/j.theriogenology.2020.01.028.
   PubMed Web of Science ®Google Scholar
• Lamb GC, Mercadante VRG. 2016. Synchronization and artificial insemination strategies in beef cattle. Vet Clin North Am - Food Anim Pract. doi:10.1016/j.cvfa.2016.01.006.
   PubMed Web of Science ®Google Scholar
• Madureira G, Consentini CEC, Motta JCL, Drum JN, Prata AB, Monteiro PLJ, Melo LF, Gonçalves JRS, Wiltbank MC, Sartori R. 2020. Progesterone-based timed AI protocols for Bos indicus cattle II: reproductive outcomes of either EB or GnRH-type protocol, using or not GnRH at AI. Theriogenology. 145:86–93. doi:10.1016/j.theriogenology.2020.01.033.
   PubMed Web of Science ®Google Scholar
• Marquezini GHL, Dahlen CR, Bird SL, Lamb GC. 2011. Administration of human chorionic gonadotropin to suckled beef cows before ovulation synchronization and fixed-time insemination: replacement of gonadotropin-releasing hormone with human chorionic gonadotropin1. J Anim Sci. 89:3030–3039. doi:10.2527/jas.2010-3455.
   PubMed Web of Science ®Google Scholar
• Martínez MF, Kastelic JP, Adams GP, Cook B, Olson WO, Mapletoft RJ. 2002. The use of progestins in regimens for fixed-time artificial insemination in beef cattle. Theriogenology. 57:1049–1059. doi:10.1016/S0093-691X(01)00682-3.
   PubMed Web of Science ®Google Scholar
• Mesquita FS, Pugliesi G, Scolari SC, França MR, Ramos RS, Oliveira M, Papa PC, Bressan FF, Meirelles FV, Silva LA, et al. 2014. Manipulation of the periovulatory sex steroidal milieu affects endometrial but not luteal gene expression in early diestrus Nelore cows. Theriogenology. 81:861–869. doi:10.1016/j.theriogenology.2013.12.022.
   PubMed Web of Science ®Google Scholar
• Mihm M, Baker PJ, Ireland JLH, Smith GW, Coussens PM, Evans ACO, Ireland JJ. 2006. Molecular evidence that growth of dominant follicles involves a reduction in follicle-stimulating hormone dependence and an increase in luteinizing hormone dependence in Cattle1. Biol Reprod. 74:1051–1059. doi:10.1095/biolreprod.105.045799.
   PubMed Web of Science ®Google Scholar
• Mínguez C, Calvo A. 2020. Effect of equine chorionic gonadotropin on pregnancy rate in Brown Swiss cows under high altitude conditions. J Appl Anim Res. doi:10.1080/09712119.2020.1741373.
   Web of Science ®Google Scholar
• Mussard ML, Burke CR, Behlke EJ, Gasser CL, Day ML. 2007. Influence of premature induction of a luteinizing hormone surge with gonadotropin-releasing hormone on ovulation, luteal function, and fertility in cattle1. J Anim Sci. 85:937–943. doi:10.2527/jas.2006-592.
   PubMed Web of Science ®Google Scholar
• Prata A, Drum J, Melo L, Araujo E, Sartori R. 2018. Effect of different chorionic gonadotropins on final growth of the dominant follicle in Bos indicus cows. Theriogenology. 111:52–55. doi:10.1016/j.theriogenology.2018.01.011.
   PubMed Web of Science ®Google Scholar
• Pugliesi G, Santos FB, Lopes E, Nogueira É, Maio JRG, Binelli M. 2016. Improved fertility in suckled beef cows ovulating large follicles or supplemented with long-acting progesterone after timed-AI. Theriogenology. 85:1239–1248. doi:10.1016/j.theriogenology.2015.12.006.
   PubMed Web of Science ®Google Scholar
• Sá Filho MF, Torres-Júnior JRS, Penteado L, Gimenes LU, Ferreira RM, Ayres H, Castro E, Paula LA, Sales JNS, Baruselli PS. 2010. Equine chorionic gonadotropin improves the efficacy of a progestin-based fixed-time artificial insemination protocol in nelore (Bos indicus) heifers. Anim Reprod Sci. 118:182–187. doi:10.1016/j.anireprosci.2009.10.004.
   PubMed Web of Science ®Google Scholar
• Sa Filho O, Meneghetti M, Peres RFG, Lamb GC, Vasconcelos JLM. 2009. Fixed-time artificial insemination with estradiol and progesterone for Bos indicus cows II: strategies and factors affecting fertility. Theriogenology. 72:210–218. doi:10.1016/j.theriogenology.2009.02.008.
   PubMed Web of Science ®Google Scholar
• Sales JNS, Crepaldi GA, Girotto RW, Souza AH, Baruselli PS. 2011. Fixed-time AI protocols replacing eCG with a single dose of FSH were less effective in stimulating follicular growth, ovulation, and fertility in suckled-anestrus Nelore beef cows. Anim Reprod Sci. 124:12–18. doi:10.1016/j.anireprosci.2011.02.007.
   PubMed Web of Science ®Google Scholar
• Santos IC, Martins C, Valentim R, Baruselli PS. 2007. Pregnancy rate in FTAI anestrus bos indicus cows treated with a single dose of fshp (folltropin®) (abstract). Acta Sci. Vet. 35:1151.
   Google Scholar
• Santos JEP, Thatcher WW, Pool L, Overton MW. 2001. Effect of human chorionic gonadotropin on luteal function and reproductive performance of high-producing lactating Holstein dairy cows. J Anim Sci. 79:2881–2894. doi:10.2527/2001.79112881x.
   PubMed Web of Science ®Google Scholar
• Small J, Dias F, Pfeifer L, Lightfoot K, Colazo M, Kastelic J, Mapletoft R. 2008. Administration of Follicle-Stimulating Hormone At Cidr Removal Does Not Affect the Pregnancy Rate in a Cidr-Based, Cosynch Protocol in Lactating Beef Cows. Reprod Fertil Dev. 20:90–90. doi:10.1071/RDv20n1Ab20.
   Web of Science ®Google Scholar
• Small JA, Colazo MG, Kastelic JP, Mapletoft RJ. 2009. Effects of progesterone presynchronization and eCG on pregnancy rates to GnRH-based, timed-AI in beef cattle. Theriogenology. 71:698–706. doi:10.1016/j.theriogenology.2008.09.045.
   PubMed Web of Science ®Google Scholar
• Souza A, Valenza A, Carneiro T, Zanatta G. 2019. A low dose of hCG (150IU) associated to inducing ovulation with estradiol benzoate can successfully replace eCG in timed AI protocols in Nelore cows 2019.
   Google Scholar
• USDA. 2020. Beef 2017, Beef Cow-calf management practices in the United States, 2017, Report 1. Fort Collins.
   Google Scholar
• U.S. Food and Drug Administration. 2019. The Cattle Estrous Cycle and FDA-Approved Animal Drugs to Control and Synchronize Estrus—A Resource for Producers [WWW Document]. https://www.fda.gov/animal-veterinary/product-safety-information/cattle-estrous-cycle-and-fda-approved-animal-drugs-control-and-synchronize-estrus-resource-producers.
   Google Scholar
• Wagner J, Lusby K, Oltjen J, Rakestraw J, Wettemann R, Walters L. 1988. Carcass composition in mature hereford cows: estimation and effect on daily metabolizable energy requirement during winter. J Anim Sci. 603–612. doi:10.2527/jas1988.663603x
   PubMed Web of Science ®Google Scholar
• Whittier WD, Currin JF, Schramm H, Holland S, Kasimanickam RK. 2013. Fertility in angus cross beef cows following 5-day CO-synch + CIDR or 7-day CO-synch + CIDR estrus synchronization and timed artificial insemination. Theriogenology. 80:963–969. doi:10.1016/j.theriogenology.2013.07.019.
   PubMed Web of Science ®Google Scholar