C5 and polycystic ovary syndrome: Serum inflammatory cytokine protein microarray detection results showed that, the expression of inflammatory cytokines complement component C5/C5α, C‐X‐C motif chemokine ligand 12/stromal cell‐derived factor‐1 (CXCL12/SDF-1), macrophage migration inhibitory factor (MIF), and plasminogen activator inhibitor-1 (Serpin E1/PAI-1) were remarkably increased in overweight patients with PCOS compared with those in non-overweight group, Table 3.