Giant Pandas Mei Xiang and Tian Tian

(Image credit: Mehgan Murphy, Smithsonian's National Zoo)Mei Xiang and Tian Tian in 2008.

Cutie Pie

(Image credit: Smithsonian National Zoo, screengrab)The 15-year-old female panda Mei Xiang gave birth to a cub on Aug. 23, 2013, immediately cradling the little one.

Giving Birth

(Image credit: Smithsonian National Zoo, screengrab)The Smithsonian National Zoo's female panda Mei Xiang gave birth to a cub on Aug. 23, 2013.

Mei Xiang

(Image credit: Smithsonian National Zoo, screengrab)The Smithsonian National Zoo's female panda Mei Xiang gave birth to a cub on Aug. 23, 2013.

Watching a Panda Cam

(Image credit: Smithsonian National Zoo, screengrab)Smithsonian National Zoo director Dennis Kelly with giant panda Mei Xiang and her cub on the panda cam in the David Rubenstein Panda House on Aug. 23, 2013.

First Checkup

(Image credit: Courtney Janney, Smithsonian's National Zoo)The cub received its first neonatal exam on the morning of Aug. 25.

Healthy Baby

(Image credit: Courtney Janney, Smithsonian's National Zoo)In its first exam, the cub weighed about 4.8 ounces (137 grams), and appeared healthy.

Giant Panda

(Image credit: Smithsonian National Zoo)Mei Xiang, female giant panda, Smithsonian's National Zoological Park.

First Cub

(Image credit: Smithsonian National Zoo)Mei Xiang isn't a first-time mom. At 3 weeks old, Mei Xiang's first cub takes a nap nestled in her arms. The cub, born on July 9, 2005, was the result of artificial insemination and now lives at the Panda Base in BiFengxia in Ya'an, China.

Panda Cub

(Image credit: Smithsonian National Zoo)Mei Xiang's 8-week-old cub gets measured during a checkup on Oct. 17, 2013, at the Smithsonian Zoo.

Getting Pudgy!

(Image credit: Smithsonian National Zoo)The panda cub, now 8 weeks old, weighs 5 pounds (2.6 kilograms) with her eyes partially open. Image taken during a zoo exam on Oct. 17, 2013.