Cytokine supplementation influences bovine embryo transcriptome during the preimplantation period

This study investigated whether adding three supportive proteins - FGF2, LIF, and IGF1 (together called FLI) - could improve the development of cow embryos grown in vitro. In cattle breeding, embryos are often produced outside the body to enhance fertility and support genetic selection. However, many embryos fail to develop properly under laboratory conditions. To address this, researchers tested whether FLI could create a more favorable environment for early embryo growth. Although embryos grown with and without FLI appeared similar under the microscope, gene expression analysis revealed important differences. Embryos exposed to FLI showed signs of improved cell survival, healthier growth, and reduced stress. These molecular changes suggest that FLI may help embryos become more resilient to key procedures such as freezing and transfer. The findings support the use of FLI as a culture supplement to improve the efficiency and success of in vitro embryo production systems used in livestock reproductive biotechnologies.