Figure 2. Spearman rank correlation (rs) between the mRNA expression levels of (A) PPAR-γ and COX-2, (B) PPAR-γ and IL-6, (C) PPAR-γ and TNF-α, (D) COX-2 and IL-6, (E) COX-2 and TNF-α, and (F) IL-6 and TNF-α in granulosa cells. Spearman correlation analysis indicated a significant positive association among the levels of PPAR-γ, COX-2, IL-6, and TNF-α mRNA in granulosa cells. COX, cyclooxygenase; PPAR, peroxisome proliferator-activated receptor; IL, interleukin; TNF, tumor necrosis factor.