The 88-year-old has been hospitalized since November 23, first for a bronchitis-related cough and more recently with a lingering fever.
Bush's spokesman and a Texas hospital spokesman did not immediately respond to messages left by The Associated Press this morning.
A spokesman said yesterday that only changes in Bush's condition would prompt updates.
The most recent word came Thursday evening, when Bush released a statement mourning the death of retired Gen Norman Schwarzkopf.
Schwarzkopf led the Bush-assembled international military coalition that in 1991 routed Iraqi forces who invaded Kuwait.
Houston: The Bush family is keeping quiet on former US President George HW Bush's health condition.
First Published: Friday, December 28, 2012, 23:51