The goal was to determine how blood levels of pregnancy-related hormones (estrogen and progesterone), vitamin D, markers of inflammatory response (white blood cell count, C-reactive protein, fibrinogen, neutrophil count, lymphocyte count, and ferritin), indicators of anemia (hemoglobin, red blood cell count, hematocrit, and ferritin), thyroid hormones (TSH, FT3, and FT4) and markers of coagulation abnormalities (D-dimer, platelets, fibrinogen, APTT, and INR) are associated with increased EPDS scores for postpartum depression. This evidence concerns the gene CRP and postpartum depression.