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Reproduction, Fertility and Development Reproduction, Fertility and Development Society
Vertebrate reproductive science and technology
REVIEW

Physiological parameters related to oocyte nuclear differentiation for the improvement of IVM/IVF outcomes in women and cattle

Jose Buratini A B * , Ana Caroline Silva Soares B , Rodrigo Garcia Barros C , Thaisy Tino Dellaqua B , Valentina Lodde C , Federica Franciosi C , Mariabeatrice Dal Canto A , Mario Mignini Renzini A and Alberto Maria Luciano C
+ Author Affiliations
- Author Affiliations

A Biogenesi Reproductive Medicine Centre – Eugin Group, Istituti Clinici Zucchi, Monza, Italy.

B Department of Structural and Functional Biology, Sao Paulo State University, Botucatu, Brazil.

C Reproductive and Developmental Biology Laboratory, Department of Health, Animal Science and Food Safety, University of Milan, Milan, Italy.

* Correspondence to: j.buratini@unesp.br

Reproduction, Fertility and Development 34(2) 27-35 https://doi.org/10.1071/RD21278
Published online: 8 November 2021

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing on behalf of the IETS

Abstract

In vitro maturation (IVM) has been applied in numerous different contexts and strategies in humans and animals, but in both cases it represents a challenge still far from being overcome. Despite the large dataset produced over the last two decades on the mechanisms that govern antral follicular development and oocyte metabolism and differentiation, IVM outcomes are still unsatisfactory. This review specifically focuses on data concerning the potential consequences of using supraphysiological levels of FSH during IVM, as well as on the regulation of oocyte chromatin dynamics and its utility as a potential marker of oocyte developmental competence. Taken together, the data revisited herein indicate that a significant improvement in IVM efficacy may be provided by the integration of pre-OPU patient-specific protocols preparing the oocyte population for IVM and more physiological culture systems mimicking more precisely the follicular environment that would be experienced by the recovered oocytes until completion of metaphase II.

Keywords: bovine, cumulus cells, chromatin configuration, FSH, germinal vesicle, human, in vitro maturation (IVM), oocyte.


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