Factors affecting the embryo recovery and pregnancy rates after transcervical transfer in equines of the Mangalarga breed

Authors

  • João Junqueira Fleury Faculdade de Medicina Veterinária 'Octávio Bastos', São João da Boa Vista, SP
  • Abílio Junqueira Pinto Secretaria da Agricultura do Estado de São Paulo, São Paulo, SP
  • Alexandre Marques Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP
  • César Gonçalves Lima Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos, Departamento de Ciências Básicas, Pirassununga, SP
  • Rubens Paes de Arruda Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Reprodução Animal, São Paulo, SP

DOI:

https://doi.org/10.1590/S1413-95962001000100005

Keywords:

Embryo, Equine, Corpus luteum, Mangalarga, Pregnancy

Abstract

This study had the objective of evaluating the effect of uterine flushing part, flushing day (D7 or D8), embryo size, age of recipients corpus luteus and transcervical technique on embryos recovery and in the pregnancy rates. There were differences (p < 0.05) in embryos recovery rates on overall flushing (154) in relation to the flushing part (F.P.) 1 (27.3%), 2 (15.6%) and 3 (18.2%), but not statistical differences (p >; 0.05) for the pregnancy rates (F.P.1, 76.2%; F.P.2, 83.3% and F.P.3, 78.6%). There was statistically tendency (p = 0.051) in the number of recovered embryos (37.5 and 62.8%) in the D7 or D8, respectively. However, there was no difference (p >; 0.05) in the pregnancy rates (66.7 and 78.3%), when the embryos were recovered in the D7 or D8. It could be observed statistically differences (p < 0.05) in the embryos size, which were collected at D7 (0.230 mm ± 0.035 mm) and D8 (0.896 mm ± 0.063 mm). It's appropriate to emphasize that the pregnancy rates did not suffer any influence. Considering the age of the recipient corpus luteus at 5, 6, 7 and 8 days after the ovulation, there were no differences in pregnancy rates 71.4, 88.9, 65.4 and 88.6%, respectively, during the breeding season 96/97. There were not found relevant differences (p >; 0.05) in the recovered embryos (50.9 and 59.5%) and pregnancy rates (77.2 and 77.7%), during the breeding season of 95/96 and 96/97, with inovulated embryos by the transcervical technique.

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Published

2001-01-01

How to Cite

Fleury, J. J., Pinto, A. J., Marques, A., Lima, C. G., & Arruda, R. P. de. (2001). Factors affecting the embryo recovery and pregnancy rates after transcervical transfer in equines of the Mangalarga breed. Brazilian Journal of Veterinary Research and Animal Science, 38(1), 29-33. https://doi.org/10.1590/S1413-95962001000100005

Issue

Section

VETERINARY MEDICINE

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