Differentially expressed gene (DEG) analyses comparing samples from women with and women without PCOS in epithelial subpopulations identified the most DEGs in SOX9+LGR5+ (n = 138), SOX9+ cycling (n = 174), AR+ (n = 257) and ciliated (n = 259) subclusters. The gene discussed is SOX9; the disease is polycystic ovary syndrome.