11 research outputs found
Factors associated with pregnancy rate in fixed-time embryo transfer in cattle under humid-tropical conditions of México
Culture conditions for bovine embryonic stem cell-like cells isolated from blastocysts after external fertilization
Developmental Block and Programmed Cell Death in Bos indicus Embryos: Effects of Protein Supplementation Source and Developmental Kinetics
Analysis of apoptosis and methyltransferase mRNA expression in porcine cloned embryos cultured in vitro
Derivation of buffalo embryonic stem-like cells from in vitro-produced blastocysts on homologous and heterologous feeder cells
Production and Characterization of Putative ntES Cells from Handmade Cloned Goat Embryos Derived from Adult Fibroblast Donor Cells
Efficient delivery of DNA into bovine preimplantation embryos by multiwall carbon nanotubes
The effect of lysophosphatidic acid during in vitro maturation of bovine cumulus–oocyte complexes: cumulus expansion, glucose metabolism and expression of genes involved in the ovulatory cascade, oocyte and blastocyst competence
Cylindrospermopsin induces biochemical changes leading to programmed cell death in plants
The importance of the periconception period : immediate effects in cattle breeding and in assisted reproduction such as artificial insemination and embryo transfer
In livestock breeding, the successful outcome is largely depending on the "periconception environment" which, in a narrow sense, refers to the genital tract, where gametogenesis and embryogenesis occur. During these early stages of development, gametes and embryos are known to be particularly sensitive to alterations in their microenvironment. However, as the microenvironment somehow reflects what is going on in the external world, we must widen our definition of "periconception environment" and refer to all events taking place around the time of conception, including metabolic state and health and nutrition of the dam. In modern dairy cows that have to manage an optimal reproductive performance with continued growth and high milk yield, the periconception period is particularly challenging. The metabolic priority for growth and lactation is known to generate adverse conditions hampering optimal ovarian function, oocyte maturation, and development of embryo/fetus. In addition, by using artificial reproductive technologies (ARTs), gametes and/or embryos of livestock are exposed to unnatural conditions outside the male and female genital tract. Artificial insemination, the most widely used technique, is currently yielding pregnancy rates similar to natural mating, and calve