[The status of prenatal lung ripening].

Morbidity and mortality of low-weight infants depend mainly on the respiratory-distress syndrome (RDS) and its complications, such as neonatal asphyxia and intraventricular haemorrhage. This underlines the importance of prenatal prevention of RDS. The results of the present multicentre studies demonstrate successful acceleration of fetal lung maturation by glucocorticoids and ambroxol. Both agents lower the RDS-rate two to threefold. The effectiveness in accelerating fetal lung maturation is comparable. In contrast to glucocorticoids, ambroxol seems to have no severe potential maternal or fetal side effects. We believe that prenatal prevention of RDS remains the treatment of choice even if neonatal surfactant therapy is expected to open up new aspects for the future.