Factors that affect the in vitro production of bovine embryos: A review
DOI:
https://doi.org/10.17533/udea.rccp.324261Palabras clave:
ganado bovino, producción in vitro de embriones, maduración in vitro de oocitosResumen
In vitro embryo production (IVP) represents a way to increase gamete use from animals with high zootechnical value. In spite of the advances obtained in IVP over the last few years, production of transferable embryos is still low. The aim of this review is to discuss ways to produce in vitro embryos, as well as oocytes formation and maturation processes that can be related to the effectiveness of obtained results. Some studies show the influence of follicular growth factors, gonadotropins, steroids and other hormones on the follicular development and the quality of the cumulus oocyte complex (COC). The follicular phase of slow growth is critical for the development of the oocyte capacity to reach the final competence and diameter. Information about endocrine influences, or likewise, the dependence of growth of small antral follicles when a loss in the oocyte or follicle functionality occurs is scarce in the literature. A variable number of different techniques and protocols for treatment of oocytes donors are described with the aim of improve the results, the COCs recovering rate and the developmental competence in vitro of collected oocytes. From the considerations presented in this review, it is possible to verify the importance of better understanding the factors involved in the IVP process, with the aim of allow new alternatives to increase the results obtained in programs of animal assisted reproduction.
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