HGF and endometriosis: 1,25(OH)2D3 treatment had no significant effect on HGF protein expression in PFMCs of patients with and without endometriosis compared with untreated controls at 6 and 24 h (Figure 2Bd,e) while this treatment reduced HGF protein expression in the PFMCs of endometriosis patients at 48 h (p < 0.01; Figure 2Bf).