[Bioethical aspects in the care of extremely preterm infants].

The survival rate of extremely preterm infants improved over the last years as a result of a better prenatal and neonatal care mainly due to a greater use of antenatal steroids, appropriate management in the delivery room and in the initial care, surfactant therapy, and better modalities of assisted ventilation. However, this improvement in survival has not been associated with an equal reduction in morbidity. In fact, the frequency of bronchopulmonary displasia, sepsis, poor growth, and neurological disorders in the future may have increased. The purpose of this article is to examine, from a bioethical point of view, different aspects in perinatal care at the threshold of viability.