1. Tumor necrosis factor-α but not interleukin-1β or interleukin-8 concentrations correlate with angiogenic activity of peritoneal fluid from patients with minimal to mild endometriosis 
Jacques W.M Maas, M.D., Carlos Calhaz-Jorge, M.D., Gerben ter Riet, M.D., Gerard A.J Dunselman, M.D., Anton F.P.M de Goeij, Ph.D., Harry A.J Struijker-Boudier, Ph.D. 
Fertility and Sterility 
Volume 75, Issue 1, Pages (January 2001)
DOI: /S (00)

2. Figure 1
Normal unmanipulated chick embryo chorioallantoic membrane at day 14. The silicon ring has an inner diameter of 10 mm (original magnification, ×6).
Maas. Tumor necrosis factor-α. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (00) )

3. Figure 2
Angiogenic response in chick embryo chorioallantoic membrane assay of peritoneal fluid from a woman with endometriosis. The silicon ring has an inner diameter of 10 mm (original magnification, ×6).
Maas. Tumor necrosis factor-α. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (00) )

4. Figure 3
Relation between the concentration of total protein (A), tumor necrosis factor (TNF)-α (B), interleukin (IL)-8 (C), and IL-β (D) in peritoneal fluid of 35 women with minimal to mild endometriosis and the induced angiogenic response in the chick embryo chorioallantoic membrane model (vascular density index [VDI]).
Maas. Tumor necrosis factor-α. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (00) )