IGF1 and endometriosis: Also this treatment had no significant effect on IGF‐1 protein expression in PBMCs of these two groups compared with untreated controls at 6 h (Figure 3Ad) while the protein expression of IGF‐1 in PBMCs of endometriosis patients and non‐endometriotic individuals decreased significantly at 24 and 48 h following 1,25(OH)2D3 treatment (p < 0.05; Figure 3Ae,f).