"Michael's condition has been carefully supervised all night and has remained stable this morning," said Sabine Kehm.
"For the moment, the good news for today is that we will not hold a press conference because there are no significant changes. Still, the condition overall is critical."
On Tuesday, doctors reported that Schumacher had undergone a second operation to ease the pressure on his brain following injuries including lesions and contusions in Sunday's fall. The procedure involved removing a large hematoma (a build-up of blood) from the left-hand side of Schumacher's brain, easing the pressure within his skull.
The 44-year-old German hit his head after falling during a family skiing trip at the Meribel resort. He was quickly taken by helicopter to hospital in Moutiers before being moved to Grenoble, where doctors said he had suffered "a severe head injury with coma on arrival, which required neurosurgical intervention immediately."
Schumacher, an accomplished skier as well as the most successful F1 driver in history, was wearing a helmet when he suffered the accident, without which doctors said he almost certainly "wouldn't be here now".
As tributes poured in from fans, friends and fellow drivers, Schumacher’s family stated: “Following Michael's sking accident, we would like to thank the people from all around the world who have expressed their sympathy and sent their best wishes for his recovery. They are giving us great support. We all know he is a fighter and will not give up.”