CRP levels in patients with gestational diabetes (7.94 mg/L±5.95), diabetes type 1 (7.41 mg/L ± 4.55) and diabetes type 2 (6.96 mg/ L±4.43) were significantly higher than in non diabetic women (5.88 mg/L±4.91). This evidence concerns the gene CRP and type 1 diabetes mellitus.