-DNA source: maternal and neonatal-73 SNPs in glucocorticoid-related genes, including drug-metabolizing enzymes (CYP3A5 and CYP3A7), transport proteins (IPO13 and ABCB1), signaling proteins (ADCY9), and hormone receptors (CRHR1 and NRC31)Association of genotypes with RDS by logistic regression-. This evidence concerns the gene CRHR1 and newborn respiratory distress syndrome.