Pressed for details by her co-anchor, George Stephanopoulos, Roberts likened her return to an athlete getting back on the field after an injury.
"They don't go right back into the starting lineup. They go to practice, they throw the ball, and see how their body reacts," she explained.
One preliminary step: "I got up at 4 a.m. this morning," she said proudly. "I've got to get back on 'GMA' time."
Next week, she will go through a dry run: arriving at the studio and getting into makeup as if she were about to do the show, but stopping short of actually going on camera. It will be a test to see how her body reacts to the stress of being back in the studio environment, she said, adding that she will even need to re-accustom her skin to the studio lights.
After the dry run, Roberts and her doctors will evaluate her status to further pinpoint a return date.
"We're going to take it step by step," she said.