Monarch Disease Ontology identifier MONDO_0006663 (perinatal asphyxia) is a disorder caused by a lack of blood flow or gas exchange to or from the fetus in the period immediately before, during, or after the birth process. Also known as: HIE, asphyxia - birth, asphyxia neonatorum, asphyxia, in liveborn infant, birth asphyxia, birth depression, fetal asphyxia, foetal asphyxia.