qPCR was used to determine the mRNA expression of PRC2 components SUZ12, EED, and EZH2 in eutopic tissue from women with no endometriosis (EuN, n = 5) or women with endometriosis (EuE, n = 10) and ectopic tissue from women with endometriosis (EcE, n = 6) (Figure 1A). The gene discussed is SUZ12; the disease is endometriosis.