Schumacher, 45, remains at University Hospital Center in Grenoble, France, not far from the Meribel ski resort where he suffered a concussion in December. After initial reports that his condition had slightly improved his doctors and family ended regular updates.
Schumacher underwent two operations to remove blood clots from his brain but more inoperable clots were imaged deeper in his brain threatening his survival, the Times said. He has been in a medically induced coma since late December.
Medical updates since his surgeries have only characterized his condition as "unchanged."
Anesthesiologist Gary Hartstein, an American based in Belgium who headed Formula One's medical unit until 2012, told the newspaper: "If they're not releasing good news because there is none, then that's very bad news indeed. After eight weeks, if there's no sign of waking, what most people would do is unplug."
Schumacher was skiing with his 14-year-old son on a moderately difficult run when he fell and hit his head on a rock, splitting his helmet.
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