Furthermore, by day 63 after CRS induction, the circulating levels of fibroblast growth factor 23 (FGF23) (i.e., acts as an inhibitor of renal phosphate reabsorption), brain natriuretic peptide (BNP) and XO, displayed an identical pattern of day-63 creatinine level among the groups. This evidence concerns the gene FGF23 and congenital rubella syndrome.