Interestingly, endometriosis-associated gene dysregulation in early secretory phase matches dysregulation in the transgenic mouse endometrium in the present study in terms of affected gene-set, above all the progesterone-regulated genes (e.g. Errfi1, Bcl6, Cited2, Irs2, Tgfb2, Gpx3, Tk1). This evidence concerns the gene CITED2 and endometriosis.