Seven-time Formula One champion Michael Schumacher is showing signs of consciousness, according to his agent.

Sabine Kehm, the driver’s spokeswoman, declined to release any further details, saying he would remain at hospital in Grenoble.

She said in statement: “Michael makes ?progress on his path, Kehm said, quoted by Euronews. He shows moments of consciousness and awakening.

“We ask for a new understanding about the lack of detail. This is absolutely necessary to respect the privacy of Michael and his family , and to allow the medical team to work with confidence.”

Schumacher smashed his head on a rock while skiing off-piste in the French Alps resort of Meribel on December 29.

Since then he's been in medically induced coma and the reports on his condition are rather contradictory. 

Recently former Formula 1 chief doctor Dr. Gary Hartstein said the prognosis for Schumacher was grave.

"As time goes on, it becomes less and less likely that Michael will emerge to any significant extent," he said in a March 24 blog post.

The "longer one remains in a vegetative state, the less the likelihood of emerging, and the higher the chances of severe ramifications if the patient does in fact emerge. Most definitions consider the vegetative state to be permanent one year after the injury. Patients who are in a persistent/permanent vegetative state have lifespans that are measured in months to a few years.”

In early January, a French prosecutor investigating the accident said that speed was not a reason for Schumacher's fall.

His investigative team says it thinks the experienced skier hit a rock hidden beneath the snow while traversing an area between two marked pistes, which catapulted him face first onto another rock.