Use of Doppler ultrasonography in embryo transfer programs: feasibility and field results

Autor(es)

Pugliesi, Guilherme ^[1] ; de Melo, Gabriela Dalmaso ^[1] ; Ataide, Jr., Gilmar Arantes ^[1] ; Gontijo Pellegrino, Carlos Augusto ^[2] ; Silva, Julio Barboza ^[3] ; Rocha, Cecilia Constantino ^[1] ; Motta, Igor Garcia ^[1] ; Moraes Vasconcelos, Jose Luiz ^[4] ; Binelli, Mario ^[5]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Reprod Anim, Fac Med Vet & Zootecnia, Pirassununga, SP - Brazil

^[2] Prole, Belo Horizonte, MG - Brazil

^[3] Embryo Sys, Ouro Fino, MG - Brazil

^[4] UNESP, Dept Prod Anim, Botucatu, SP - Brazil

^[5] Univ Florida, Dept Anim Sci, Gainesville, FL - USA

• Tipo de documento: Artigo Científico
• Fonte: ANIMAL REPRODUCTION; v. 15, n. 3, p. 239-246, JUL-SEP 2018.
• Citações Web of Science: 6

Resumo

The intensive use of Doppler ultrasonography in several studies in the last decade allowed the characterization of vascular perfusion and the estimation of function of the reproductive organs and tissues along the estrous cycle and pregnancy in cattle. We aim to discuss the possibility of using Doppler imaging and to explore the potential of its inclusion in reproductive programs in cattle industry. Recent studies in dairy and beef cows indicated a high accuracy and sensitivity when Doppler ultrasonography is used to evaluate corpus luteum function and to diagnosis pregnancy between days 20 and 22. Moreover, resynchronization programs starting 5 to 7 days after timed embryo transfer (FTET) coupled with early pregnancy diagnosis were developed for beef cattle, and have been implemented in commercial embryo transfer programs. These strategies allow a reduction in the interval between two FTET from 40 to 24 days and may improve the gains in reproductive efficiency when compared to traditional programs than begin resynchronization after the pregnancy diagnosis at 30 days. A second alternative to use Doppler imaging is the evaluation of luteal blood perfusion at the time of embryo transfer for selection of recipients with greater receptivity potential. This may increases fertility in FTET, as embryos would not be transferred to females with non-functional CL, and in cases with recipients surplus, females with higher receptivity would be prioritized. (AU)

• Processo FAPESP: 17/18613-0 - Efeitos da ressincronização da ovulação com estradiol aos 14 dias pós-IATF sobre as características morfofuncionais do corpo lúteo e útero em fêmeas Nelore
• Beneficiário: Igor Garcia Motta
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 16/23964-3 - Inovações no diagnóstico precoce da gestação em bovinos
• Beneficiário: Guilherme Pugliesi
• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores
• Processo FAPESP: 15/10606-9 - Inovações no diagnóstico precoce da gestação em bovinos
• Beneficiário: Guilherme Pugliesi
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 17/13472-9 - Diagnóstico precoce da gestação em bovinos através da expressão de genes estimulados por interferon-tau em neutrófilos
• Beneficiário: Gabriela Dalmaso de Melo
• Modalidade de apoio: Bolsas no Brasil - Mestrado