TGFB1 and endometriosis: This study shows that DEHP plays an important role in the etiology and pathogenesis of endometriosis by enhancing cell proliferation and migration and inducing EMT and stem cell properties via the TGF-β/Smad signaling pathway in human endometrial and endometriotic epithelial cells (EEECs) using a biomimetic hydrogel-based 3D culture model.