GREB1 and endometriosis: Other recent small studies on genetic regulation of endometrial gene expression (expression quantitative trait loci; eQTL)24 and DNAm (methylation quantitative trait loci; mQTL)25 demonstrate associations between specific genotypes and expression of genes in signaling pathways and between DNAm sites near GREB1 and KDR, genes involved in endometriosis pathogenesis.