Last week, San Diego Zoo examined its five-week-old baby Giant Panda for the third time. Veterinarians determined that the 3.2-pound cub is a boy! He's a bit lighter in weight than mother Bai Yun's previous five cubs, but this baby panda looks healthy with a belly girth of 12 inches, indicating he is eating well. The 13-inch-long cub gained 1 pound from his previous exam a week earlier. San Diego Zoo follows the Chinese cultural tradition of naming Giant Pandas after they are 100 days old. Stay tuned as San Diego Zoo will be announcing details on how the public can help name the new cub. The cub will remain in the den with his mother several months. Watch them live on the zoo's Panda Cam: www.sandiegozoo.org/pandacam.