One reason for the delay is the eagerly anticipated Congressional Budget Office score on how much the health care bill now before the House would cost. Its release is expected any day.
The CBO issued an updated cost estimate of the health care bill that passed the Senate Dec. 24, which didn't include the changes being negotiated with the White House. The updated estimate was up slightly, from $871 billion to $875 billion over 10 years. And the total deficit reduction went from $132 billion to $118 billion.
After congressional Democrats broke from their meeting Thursday night, White House chief of staff Rahm Emanuel told reporters, "It was a very good meeting. A lot of decisions were made. We're getting towards the end."
Sources described "dramatic" developments in the closed-door meetings in the past 24 hours.
As for whether Reid's personal situation will affect the process ahead, many people close to the senator say that's unlikely.
"This won't slow him down, although he may have to spend quite a bit of time with his wife here in the next few days," Sen. Mark Pryor, D-Ark., said "It's going to be a full speed ahead for him for sure."
The House budget committee may begin writing the "fixes" to the Senate bill Monday.
ABC News' Devin Dwyer contributed to this report.