Evaluation of corpus luteum, uterine contractility and progesterone and estradiol plasmatic concentrations in recipients of bovine embryos

Authors

  • Luciana da Silva Leal FMVZ/UNESP
  • Eunice Oba FMVZ/UNESP
  • Carlos Antônio de Carvalho Fernandes BIOTRAN
  • Ocilon Gomes de Sá Filho FMVZ/UNESP

DOI:

https://doi.org/10.5216/cab.v10i1.448

Keywords:

Transferência de embriões, receptoras, progesterona, estradiol, prenhez

Abstract

The aims of the present study were to evaluate the size of corpus luteum (CL), uterine contractility and plasma progesterone (P4) and estradiol (17? E2) concentrations in recipients, in the day of embryo transfer. For this, 60 crossbred recipient heifers were used. The pregnancy rate of recipients according to the CL size by rectal palpation was 70.0% (7/10 - small), 38.9% (7/18 - medium) and 60.0% (15/25 - large). Ultrasonographic evaluation detected 50.9% (29/57) of the CL with a cystic cavity. The average diameter of the CL was 17.8 ± 6.3 mm (n=57) and of cystic cavity was 6.8 ± 4.2 mm (n= 29). The mean volume of the CL was 4.4 ± 9.1 cm3 (n=57), of cystic cavity was 0.4 ± 1.0 cm3 (n=29) and of luteal mass was 4.2 ± 8.4 cm3 (n=57). In the day of the inovulation, progesterone and estradiol concentrations were respectively 4.9 ± 3.0 ng/mL (n=60) and 4.5 ± 6.0 pg/mL (n=60) in average. There was no statistic difference between progesterone and estradiol concentrations for pregnant and non-pregnant recipients. Forty-nine of the 60 recipients presented flaccid uterus (grade 1) and 11 had uterus in intermediate stage (grade 2). Those presented pregnancy rates of 47.6% (20/42) and 81.8% (9/11) (p<0.05) respectively.

KEY WORDS: Embryo transfer, estradiol and pregnancy, progesterone, recipients.

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Published

2009-04-03

How to Cite

LEAL, L. da S.; OBA, E.; FERNANDES, C. A. de C.; SÁ FILHO, O. G. de. Evaluation of corpus luteum, uterine contractility and progesterone and estradiol plasmatic concentrations in recipients of bovine embryos. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 10, n. 1, p. 174–183, 2009. DOI: 10.5216/cab.v10i1.448. Disponível em: https://revistas.ufg.br/vet/article/view/448. Acesso em: 17 jul. 2024.

Issue

Vol. 10 No. 1 (2009)

Section

Veterinary Medicine

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