This undated handout photograph released by Taipei City Zoo on July 17, 2013 shows recently born panda cub of giant panda Yuan Yuan in an incubator at Taipei Zoo in Taipei. The public will have to wait three months to catch a glimpse of the first panda born in Taiwan, officials said after she was successfully delivered by parents who were gifted from China. (Photo by AFP Photo/Taipei City Zoo)

In this photo taken Saturday, July 6, 2013 released by the Taipei Zoo, a female giant panda named Yuan Yuan one of a pair presented by China four years ago to mark warming ties with Taiwan, is seen giving birth to a female cub at the Taipei Zoo, in Taiwan. (Photo by AP Photo/Taipei City Zoo)

This undate handout photograph released by Taipei City Zoo on July 17, 2013 shows recently born panda cub of giant panda Yuan Yuan in an incubator at Taipei Zoo in Taipei. (Photo by AFP Photo/Taipei City Zoo)

This undate handout photograph released by Taipei City Zoo on July 17, 2013 shows recently born panda cub of giant panda Yuan Yuan being fed in an incubator at Taipei Zoo in Taipei. (Photo by AFP Photo/Taipei City Zoo)

In this photo taken Saturday, July 6, 2013 released by the Taipei Zoo, a panda cub is placed in an incubator by staff shortly after being born from a giant panda named Yuan Yuan, one of a pair presented by China four years ago to mark warming ties with Taiwan, at the Taipei Zoo, in Taiwan. Zoo officials said 9-year-old Yuan Yuan delivered the cub Saturday night, following artificial insemination given in March. (Photo by AP Photo/Taipei City Zoo)

This undated handout photograph released by Taipei City Zoo on July 17, 2013 shows recently born panda cub of giant panda Yuan Yuan in an incubator at Taipei Zoo in Taipei. (Photo by AFP Photo/Taipei City Zoo)

This handout photograph released by Taipei City Zoo on July 13, 2013 shows a newly-born panda cub of giant panda Yuan Yuan in an incubator at Taipei Zoo in Taipei. (Photo by AFP Photo/Taipei City Zoo)

This photo released by Zoo Atlanta on Tuesday, July 16, 2013 shows twin panda cubs born Monday to the zoo's resident giant panda Lun Lun, the first twin pandas born in the United States since 1987, zoo spokeswoman Keisha Hines announced. Hines said zookeepers who had been anticipating only one cub based on a recent ultrasound were surprised by the first-ever twin panda births at Zoo Atlanta. (Photo by Adam K. Thompson/AP Photo/Zoo Atlanta)

A 5-week-old giant panda cub, weighing 3.2 pounds (1.5 kg), is seen in this handout picture released by San Diego Zoo on September 6, 2012. (Photo by Maria Bernal-Silva/Reuters/San Diego Zoo/Zoological Society of San Diego)

A Panda cub, born July 29, 2012 is held up by staff after a routine veterinarian exam in this handout photo supplied by the San Diego Zoo in San Deigo, California August 30, 2012. (Photo by Ken Bohn/Reuters/San Diego Zoo)