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Methodological approaches for vitrification of bovine oocytes

Published online by Cambridge University Press:  04 September 2020

Linda Dujíčková Open the ORCID record for Linda Dujíčková [Opens in a new window] ,
Alexander V. Makarevich ,
Lucia Olexiková ,
Elena Kubovičová  and
František Strejček Open the ORCID record for František Strejček [Opens in a new window]
Linda Dujíčková*
Affiliation:
National Agricultural and Food Centre (NPPC), Research Institute for Animal Production Nitra, Hlohovecká 2, 95141Lužianky-near-Nitra, Slovak Republic Constantine the Philosopher University Nitra, Department of Botany and Genetics, Nábrežie mládeže 91, 94974Nitra, Slovak Republic.
Alexander V. Makarevich
Affiliation:
National Agricultural and Food Centre (NPPC), Research Institute for Animal Production Nitra, Hlohovecká 2, 95141Lužianky-near-Nitra, Slovak Republic
Lucia Olexiková
Affiliation:
National Agricultural and Food Centre (NPPC), Research Institute for Animal Production Nitra, Hlohovecká 2, 95141Lužianky-near-Nitra, Slovak Republic
Elena Kubovičová
Affiliation:
National Agricultural and Food Centre (NPPC), Research Institute for Animal Production Nitra, Hlohovecká 2, 95141Lužianky-near-Nitra, Slovak Republic
František Strejček
Affiliation:
Constantine the Philosopher University Nitra, Department of Botany and Genetics, Nábrežie mládeže 91, 94974Nitra, Slovak Republic.
*
Author for correspondence: Linda Dujíčková, National Agricultural and Food Centre (NPPC), Research Institute for Animal Production Nitra, Hlohovecká 2, 95141Lužianky-near-Nitra, Slovak Republic. Tel: +421 376546596. E-mail: [email protected]
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Summary

Numerous factors affect vitrification success and post-thaw development of oocytes after in vitro fertilization. Therefore, elaboration of an optimal methodology ensuring higher cryotolerance of oocytes and subsequent blastocyst yield is still of great interest. This paper describes and evaluates critical factors affecting the success of oocyte vitrification. In particular, an appropriate oocyte stage such as maturation status (germinal vesicle stage, metaphase II stage), presence/absence of cumulus cells before vitrification, and the effect of follicle size, as well as different culture systems and media for in vitro production of embryos, the types and concentrations of cryoprotectants, and cooling and warming rates at vitrification are considered. Special attention is paid to various cryocarriers used for low-volume vitrification, which ensures safe storage of oocytes/embryos in liquid nitrogen and their successful post-thaw recovery. At the end, we focussed on how age of oocyte donors (heifers, cows) influences post-thaw development. This review summarizes results of recently published studies describing different methodologies of cryopreservation and post-thaw oocyte development with the main focus on vitrification of bovine oocytes.

Keywords

BovineEmbryoIn vitro fertilizationOocyteVitrification
Type
Review Article
Information
Zygote , Volume 29 , Issue 1 , February 2021 , pp. 1 - 11
Copyright
© The Author(s), 2020. Published by Cambridge University Press

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