Subject(s)

Adrenal Cortex Hormones/blood , Betamethasone/pharmacology , Fetal Blood/analysis , Infant, Premature , Progestins/blood , Respiratory Distress Syndrome, Newborn/prevention & control , Betamethasone/therapeutic use , Female , Glucocorticoids/blood , Humans , Infant, Newborn , Longitudinal Studies , Male , Mineralocorticoids/blood , Pregnancy