Former First Lady Barbara Bush is in "failing health", informed family spokesperson on Sunday.
Bush, the wife of one US president and the mother of another USA president, has struggled with health issues due to COPD for several months.
Mrs. Bush, 92, has been hospitalized several times in Houston, Texas, over the past year to be treated for chronic pulmonary disease and congestive heart failure, her family has said.
Mr McGrath says Mrs Bush is surrounded by "a family she adores" and appreciates the many kind messages and prayers she has been receiving.
Her husband, George H.W. Bush, the nation's 41st president, is now 93 years old and struggling with a Parkinson's-like disease that forces him to use a wheelchair and made it hard for him to speak. Bush stood with her husband as their son George W. was sworn in as president.
As first lady, she pushed family literacy, and established a foundation for the cause. She was also the 33rd Second Lady of the United States during her husband's term as vice president.
Gay-rights lawyer burned himself to death to protest global warming
The 1999 film Boys Don't Cry , starring Hilary Swank, who won an Oscar for the role, was based on Teena's story. The former lawyer's body was found by local resident Amy Hamberry who was jogging through the park.
Bush is 92 years old. Her father was the publisher of McCall's and Redbook magazines.
All along, Barbara Bush has been regarded as an invaluable asset with a grandmotherly persona that could belie a forthright outspokenness.
Barbara Bush is the mother of former president George W. Bush, the country's 43rd president.
Smith College awarded Barbara Bush with an honorary degree in 1989.
They traveled to Texas where the oil business dominated, first in Midland-Odessa, later to the Houston area where George found his love for politics.