IGF-II, IGFBP-4, -6, and -7, and HMGB1 show changes in follicular fluid in PCOS. - Buia V; Catellani C; Croci S; Righi B; Morini D; Falbo AI; Nicoli A; De Fanti A; Belloni L; Aguzzoli L; Villani MT; Sartori C; et al. (Frontiers in endocrinology, 2026)