TGFB1 and endometriosis: In their work on a female Taiwanese population, Hsieh et al. demonstrated an association between susceptibility to endometriosis and the presence of gene polymorphisms: –509C/T in the region promoter of the transforming growth factor-β1 (TGF-β1) gene, –627A/C in the region promoter of the interleukin 10 (IL-10) gene, and 881T/C in the IL2 beta receptor gene [52].