'Which Factors Affect Pregnancy Until Calving and Pregnancy Loss in Buffalo Recipients of in vitro Produced Embryos?'

Autor: Mucio Tulio Teixeira Alvim, Bianca Gasparrini, José Nélio Souza Sales, Roberti Drumond, Henrique Bayao, Lindsay Unno Gimenes, Pietro Sampaio Baruselli, Eduardo Bastianetto, Rossella Di Palo, Wilson Pardini Saliba, Rômulo Cerqueira Leite, Marcello Rubessa
Přispěvatelé: Universidade Estadual Paulista (Unesp), Cenatte Embrioes Soc Ltd, Univ Napoli Federico II, Univ Illinois, Universidade de São Paulo (USP), Univ Fed Juiz de Fora, Universidade Federal de Minas Gerais (UFMG), Saliba, W. P., Gimenes, L. U., Drumond, R. M., Bayao, H. X. S., Di Palo, R., Gasparrini, B., Rubessa, M., Baruselli, P. S., Sales, J. N. S., Bastianetto, E., Leite, R. C., Alvim, M. T. T.
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Frontiers in Veterinary Science
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Web of Science
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Frontiers in Veterinary Science, Vol 7 (2020)
ISSN: 2297-1769
Popis: Made available in DSpace on 2021-06-25T12:28:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-12-02 Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) In vitro embryo production and embryo transfer (ET) in buffaloes has been developed for decades. However, most studies are focused on the donor or laboratory improvements, and there is a lack of reports regarding the recipients. Therefore, our aim was to investigate factors associated to pregnancy (P/ET), pregnancy loss (PL), and calving rates in buffalo recipients. The studied factors were season, recipient parity, the synchronization protocol, the CL diameter, asynchrony between the embryo and the recipient, the day of the recipient estrous cycle, the embryo (fresh vs. vitrified), the day of embryo development, and the embryo stage. These retrospective data, from a program of in vitro produced embryos, were analyzed by logistic regression, and the odds ratio was also estimated. Two factors were related to P/ET and the calving rate: (1) progesterone associated to estradiol plus eCG protocol for fixed time ET tended to affect positively P/ET on day 30 (41.9 vs. 36.1%, respectively; P = 0.07; AOR = 1.28) and P/ET on day 60 (37.8 vs. 36.1%, respectively; P = 0.09; AOR = 1.08) compared to the Ovsynch protocol; and (2) the CL diameter (>= 14.5 mm) at transfer increased P/ET on day 30 (47.4 vs. 32.5%; P < 0.01; AOR = 1.87) and on day 60 (45.3 vs. 27.7%; P < 0.01; AOR = 2.16), and also the calving rate (37.9 vs. 21.7%; P < 0.01; AOR = 2.20). PL was greater when ET was done in the nonbreeding season compared to the breeding season (PL 30-60: 12.8 vs. 0.0%, P = 0.01; AOR > 999.99; PL 60-calving: 26.8 vs. 3.6%, P = 0.03; AOR = 9.90; and PL 30-calving: 36.2 vs. 3.6%, P = 0.01; AOR = 15.30). In conclusion, the data of our study indicated that the synchronization protocol, the CL diameter, and ET during the breeding season impacted the reproductive efficiency of buffalo recipients. Univ Estadual Paulista, Dept Patol Reprod & Saude Unica, Jaboticabal, Brazil Cenatte Embrioes Soc Ltd, Pedro Leopoldo, Brazil Univ Napoli Federico II, Dipartimento Med Vet & Prod Anim, Naples, Italy Univ Illinois, Dept Anim Sci, 328 Mumford Hall, Urbana, IL 61801 USA Univ Sao Paulo, Dept Reprod Anim, Sao Paulo, Brazil Univ Fed Juiz de Fora, Dept Med Vet, Juiz De Fora, Brazil Univ Fed Minas Gerais, Dept Med Vet Prevent, Belo Horizonte, MG, Brazil Univ Estadual Paulista, Dept Patol Reprod & Saude Unica, Jaboticabal, Brazil FAPEMIG: APQ-0591-5.04/08
Databáze: OpenAIRE
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