Among angiogenic factors, VEGF secreted from activated macrophages under the influence of ovarian steroids, IL-8 expressed in endometrial stromal cells, and basic FGF expressed in endometriotic tissue and PD-ECGF expressed in lining epithelial cells independently of the sex steroidal milieu might contribute to the characteristic advancement of angiogenic lesions in endometriosis in individual manners. Copyrightz1999S.KargerAG,Basel