胎粪吸入综合征（简称ＭＡＳ），是胎儿在分娩过程中，将有胎粪污染的羊水吸入呼吸道而引起的一种疾病，是新生儿死亡的主要原因之一。本文对我院１９８０年元月至１９９９年３月期间，在围产期Ⅱ死亡尸检１７６０例中因（ＭＡＳ）致死１６０例的发病原因及机理进行探讨。１　 Meconium aspiration syndrome (referred to as MAS), is the fetus in the delivery process, there will be meconium-stained amniotic fluid inhalation of respiratory tract caused by a disease that is one of the main causes of neonatal death. This article from January 1980 to March 1999 in our hospital during the perinatal death autopsy 1760 autopsy in 160 cases (MAS) the cause of death and pathogenesis were discussed. 1