In these patients consisting of 5 with placental abruptions, 7 with uterine atonies, 1 with genital tract trauma, and 11 with HELLP syndromes, RCC transfusion was not required since coagulation factors were promptly supplemented with FFP and their Hb levels could be maintained above 7 g/dL. This evidence concerns the gene GSTM1 and placental abruption.