Bush, 88, was admitted to Houston Methodist Hospital Dec 30 for treatment of what an official statement said was "a respiratory-related issue", Xinhua reported Saturday.
Bush was first lady from 1989 to 1993. She is also the mother of former president George W Bush, who was in the White House between 2001 and 2009.
Former US first lady Barbara Bush remains hospitalised in the Houston city of the US for treatment of a respiratory-related ailment Thursday, a family spokesperson said.
Former US first lady Barbara Bush has been hospitalised in Houston with a "respiratory-related issue", an official statement said.
Barbara Bush doesn`t appear to think much of Palin`s White House aspirations.
Former first lady Barbara Bush was
on Wednesday discharged from Methodist hospital here after undergoing
medical tests for four days.
Day in Pics: 31st January
Showbiz World - January 31, 2015
Playboy Super Bowl XLIX Party