fifth-day fits

== English == === Alternative forms === fifth day fits, 5th-day fits, 5th day fits === Etymology === Most cases of the syndrome have had their onset on the fifth day of life. === Noun === fifth-day fits pl (plural only) (pathology) Benign idiopathic neonatal seizures, a rare form of seizures that manifests in newborns in the latter part of the first seven days of life.