Meconium-stained amniotic fluid and the meconium aspiration syndrome. An update.

Over the past 5 years, increasing understanding about the pathophysiology of meconium-stained amniotic fluid (MSAF) and the meconium aspiration syndrome (MAS) has occurred. Many new therapies are being used in an attempt to prevent MAS and to treat the disorder. The authors review the current status of knowledge concerning the MSAF and MAS and management of these entities.