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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Comparison of in vitro and in vivo fertilizing potential of bovine semen frozen in egg yolk or new lecithin based extenders

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Author(s):
Crespilho, A. M. [1] ; Sa Filho, M. F. [2] ; Dell'Aqua, Jr., J. A. [3] ; Nichi, M. [2] ; Monteiro, G. A. [3] ; Avanzi, B. R. [3] ; Martins, A. [4] ; Papa, F. O. [3]
Total Authors: 8
Affiliation:
[1] Univ Santo Amaro, UNISA, Sch Vet Med, Sao Paulo - Brazil
[2] Univ Sao Paulo, Dept Anim Reprod, Sao Paulo - Brazil
[3] Sao Paulo State Univ, Dept Anim Reprod & Vet Radiol, Botucatu, SP - Brazil
[4] Sao Paulo State Univ, Dept Clin Surg & Anim Reprod, Aracatuba, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: LIVESTOCK SCIENCE; v. 149, n. 1-2, p. 1-6, NOV 2012.
Web of Science Citations: 22
Abstract

One of the main factors known to influence quality and fertility of bovine cryopreserved semen is the extender used. In this matter, a great worldwide interest has been directed to the development of chemically defined media, free of animal origin products. The objective of the present study was to compare the efficacy of three bovine semen extenders: Iris-fructose (IRIS, control with 20% egg yolk), Botu-Bov (R) (BB; 20% egg yolk), and Botu-Bov (R)-soy lecithin (BB-L; 1% soy lecithin). Towards this aim, post-thaw computer assisted sperm analysis (CASA), sperm membrane and acrosome integrity were evaluated (Experiment 1). Additionally, cryopreserved samples were used in a fixed time artificial insemination program aiming to evaluate in vivo fertility (pregnancy per insemination-P/AI; Experiment 2). Despite the higher straightness and linearity found for samples cryopreserved in BB and BB-L when compared to those cryopreserved in IRIS, egg yolk based extenders provided higher total and progressive motilities, percentage of rapid sperms and intact membrane cells (P < 0.05). Furthermore, P/IA was higher in samples cryopreserved in egg yolk based extenders when compared to soy lecithin {[}TRIS=59.26(a) (64/108), BB=62.37(a) (58/93), and BB-L=36.45(b) (35/96)]. Although soy lecithin represents an alternative for the development of chemically defined extenders with decreased risk of biological contamination, egg yolk based extenders are more efficient on the preservation of bovine post-thaw sperm viability and fertility. (C) 2012 Elsevier B.V. All rights reserved. (AU)