Fig. 1

a Schematic illustration of the ALI-BOEC co-culture system and b representative HE staining of ALI-BOEC after 4 weeks of culture. Magnification 400 x. Bar = 10 μm. c Principal Component Analysis plot of gene expression data obtained from bovine preimplantation embryos produced in different in vitro conditions. Principle component 1 explains 45.3% of the variance and principle component 2 explains 13.7% of the variance