IMR Press / FBS / Volume 12 / Issue 1 / DOI: 10.2741/S543

Frontiers in Bioscience-Scholar (FBS) is published by IMR Press from Volume 13 Issue 1 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Review
In vitro strategies to enhance oocyte developmental competence
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1 Reproductive Physiology Laboratory, Division of Physiology and Climatology, ICAR- Indian Veterinary Research Institute, Izatnagar-342 122 (UP), India
Send correspondence to: Vikash Chandra, Reproductive Physiology Laboratory, Division of Physiology and Climatology, ICAR- Indian Veterinary Research Institute, Izatnagar-342 122 (UP), India, Tel: 91-5812301327, Fax: 91-5812301327, E-mail: vikashvet15@gmail.com
Front. Biosci. (Schol Ed) 2020, 12(1), 116–136; https://doi.org/10.2741/S543
Published: 1 March 2020
(This article belongs to the Special Issue Physiology and biochemistry of mammalian germ cells)
Abstract

Oocyte quality influences early embryonic survival, establishment and maintenance of pregnancy, fetal development and adult diseases. The developmental competence of oocytes is acquired gradually and increases with follicular development. The ability of an oocyte to develop into an embryo depends on, having enough specific information in the form of mRNA or proteins. If this information is insufficient, defects in nuclear or cytoplasmic maturation, or in both processes, may arise and thus affect the in vitro development of fertilized oocytes. The greater developmental competence of oocytes aspirated from larger follicles is reported as compared with smaller follicles. Oocyte developmental competence is greatly correlated with the morphology of the cumulus oocyte complexes (COCs). Apart from morphological or biochemical markers, molecular markers have also been investigated. Until now, no specific markers of oocyte developmental competence could be described for the oocyte developmental competence. To, utilize female germplasm to its maximum, there is a need to enhance developmental competence of lesser competent oocytes derived from the follicles which are not fully grown. The oocyte pre-maturation and maturation conditions affect gene expression not only in the oocyte but till the blastocyst stages too. Strategies have been discussed in this review would be useful to enhance the developmental competence of oocytes.

Keywords
Strategies
Oocyte
Competence
Mechanism
Embryo
Reproduction
Review
Figures
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