Professor John Curtice has said that the current election polls suggest the SNP is likely to miss out on a majority in the Scottish election.
A slew of surveys this week have had Ms Sturgeon's party balanced on a knife-edge of securing total control of Holyrood or just coming up short.
Looking at the trend, Scotland's polling expert said there was one "major headline" - that support for the SNP is slipping.
He also believes that Alex Salmond's Alba party is going "nowhere", with polls consistently indicating it will fail to gain the 6% of the list vote needed to return an MSP.