Cover
Vol. 3 No. 2 (2013)

Published: December 31, 2013

Pages: 32-37

Research Article

Effect of two types and two concentrations of cryoprotectants on ovine oocytes morphology and viability post-vitrification

Muhammad-Baqir M-R Fakhrildin 1 Raghad H. A. Al-Moussawi
1High Institute of Infertility Diagnosis and Assisted Reproductive Technology, Al-Nahrain University
History
  • Received: September 1, 2013
  • Available Online: December 1, 2013

Abstract

Background: Oocyte vitrification is a promising technique. The choice of appropriate types and concentrations of cryoprotectants is essential for the success of the oocytes vitrification. Objective: This study aimed to investigate the effect of vitrification on viability and morphology of oocytes and to compare the effect of several cryoprotectants on the viability and morphology of oocytes during vitrification and post-thawing. Methods: The sheep ovaries were collected from the local abattoir. Only normal and viable oocytes were included in this study. By using cryotop, immature oocytes that were viable with normal morphology were vitrified with 15% DMSO and 15% EG supplemented with 0.0 M, 0.25M, or 0.5 M of either sucrose or trehalose as control and treated groups. Oocytes viability and morphology were assessed post-aspiration and post-thawing. Results: Fromthe results of the present study, the percentage of post-thawing normal and viable oocyte reported with the use of 0.5M trehalose and EG in vitrification solution (VS) significantly)P<0.05) higher than the percentage of post-thawing normal and viable oocyte reported with use of 0.25 M trehalose and EG. Conclusion: Vitrification is simple technique and easy to perform but it needs some experience to prevent any oocyte loss during vitrification and thawing processing. The use of 0.5 M of either sucrose or trehalose in vitrification solution improves the percentage of post-thawing viable and normal oocytes.

Keywords

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