Bobbi Kristina's cousin Jerod Brown said on social media that doctors were not optimistic about the 21-year-old aspiring singer's chances.
"Though it seems the odds are against her, though doctors don't see any hope for change ... though it looks impossible for her to stand again STILL PRAY FOR BK," Jerod Brown said on Instagram, where he posts as yfkennedy.
Few details about Bobbi Kristina Brown's condition have been released. Her family has said she was fighting for her life after being rushed to a hospital in the Atlanta suburb of Roswell on Saturday.
Police said they responded to Bobbi Kristina Brown's home in reference to a drowning. Her partner and a friend found her unresponsive in the tub and performed CPR until help arrived, police said.
Houston, a six-time Grammy Award winner and actress who battled substance abuse, drowned in a hotel bathtub in Beverly Hills, California, on Feb. 11, 2012. Authorities said cocaine use and heart disease contributed to her death at age 48.