Eunice Kennedy Shriver, the mother of California's first lady, Maria Shriver, was recovering at UCLA Medical Center on Monday after a minor stroke and stress fracture in her hip, according to hospital administrators.
Shriver, 84, was admitted to the hospital Saturday.
"Doctors anticipate a short hospital stay," a statement from the administrators said.
Dan Page, a spokesman for the medical center, said it would have no further information beyond the statement.
Shriver is the sister of Sen. Edward M. Kennedy (D-Mass.), assassinated former President John F. Kennedy and Sen. Robert F. Kennedy, who was shot to death in Los Angeles in 1968 while campaigning for the Democratic presidential nomination.
She is a longtime activist on behalf of the mentally retarded, and she founded the Special Olympics for mentally disabled athletes.