Bush has been in and out of hospital recently and is now in "failing health", according to a family spokesman.
"Bush, now age 92, has decided not to seek additional medical treatment and will instead focus on comfort care", McGrath said.
Mrs. Bush is surrounded by her family and appreciates the messages and prayers she has been receiving. She had been treated in the past for the thyroid ailment known as Graves' disease. But he has been well enough to make recent public appearances, incuding RodeoHouston.
In Jan. 2017, both Barbara Bush and the former president were hospitalized for separate health issues and unable to attend President Trump's inauguration.
Former first lady Barbara Bush attends day two of the Republican National Convention (RNC) at the Xcel Energy Center on September 2, 2008 in St. Paul, Minnesota.
At 92 years old, Barbara Bush has been suffering for some time and has been in and out of the hospital multiple times in the last year while battling with COPD and congestive heart failure.
Colorado Senator Releases Statement On Marijuana Policy
President Trump "does respect Colorado's right to decide for themselves how to best approach this issue", Mr. Gardner had spoken about the issue and that the senator's account is "accurate".
Bush also revealed her secret for a long life: medical attention. Her son George said that a "crowning achievement" of his father, who was fond of coming up with nicknames for friends and family, was anointing Barbara, "The Silver Fox".
The Bushes have been married for 73 years.
"I will never forget how kind she was to me on every occasion we met, and how fondly the White House staff always spoke of her", she added.
Barbara Pierce Bush was born in Rye, New York. After World War II, the Bushes moved to Texas where he went into the oil business.
Smith College awarded Barbara Bush with an honorary degree in 1989.