The down-regulated gene sets at differential gene expression stages in early embryogenesis that pass the chi-square tests.

<p>(A) Intersection of 4 gene sets in mouse genome. Each gene set is represented by a colored oval. The numbers in green, pink, yellow and blue ovals indicate the numbers of associated mouse genes in “2-cell vs. 1-cell”, “4-cell vs. 1-cell”, “8-cell vs. 1-cell”, and “morula vs. 1-cell” differential expressions stages, respectively. (B) Intersection of 3 gene sets in human genome. A colored circle represents each gene set. The numbers in yellow, blue, and red circles indicate the numbers of associated human genes in “8-cell vs. 1-cell”, “morula vs. 1-cell”, and “blastocyst vs. 1-cell” differential expression stages, respectively. (C) Name listing of mouse-human orthologous genes found in both mouse and human intersection gene sets. Each orthologous gene pair indicates the mouse gene name followed by the human gene name. The numbers in parentheses present the corresponding gene ids.