Overlapping analysis of 165 endometriosis genes and previously identified 52 genes of four women’s cancers (Bhyan et al., 2019) revealed that nine genes were common: SPARC, CDH1, MET, TIMP1, BRCA1, IGF2, PGR, MMP9 and ESR1 (Fig. S2). Here, BRCA1 is linked to endometriosis.