While mama bear stepped away from the den on Thursday, handlers were able to whisk the little guy out for a quick check-up where he weighed in a 4.5 pounds (2.07 kilograms), almost a whole pound more than last week.
Zookeepers said that the cub mostly slept through the brief exam.
The cub measured 15 inches from nose to tail tip, and he has added almost an entire inch around his midsection, which now measures in at 13.7 inches. That's up from 12.5 inches on Sept. 30. Zookeepers say his growth and development are right on track.
Zoo officials warn visitors that the Asia Trail, which includes the giant panda viewing, is temporarily closed to visitors for repaving of walkways.