Canonical pathways that were enriched among DEGs associated with category IIB vs I endometria included mitochondrial dysfunction, pulmonary fibrosis idiopathic signaling pathway, oxidative phosphorylation, endothelin-1 signaling, HIF-1α signaling pathway, IL-13 pathway, inhibition of matrix metalloproteases, Th1 and Th2 activation pathway. This evidence concerns the gene EDN1 and pulmonary fibrosis.