Five cytokines were negatively correlated with endometriosis (IL-13, IL-5, cutaneous T-cell-attracting chemokine, monocyte chemotactic protein (MCP)-3, and macrophage colony-stimulating factor), and six were positively correlated (stem cell growth factor-beta, hepatocyte growth factor, interferon α2, MCP-1, IL-9, and leukemia inhibitory factor). This evidence concerns the gene IL13 and endometriosis.