![[PANDAS x]Bai Yun, a female giant panda, enjoys a bisquit as she climbs atop a stump in her enclosure at the San Diego Zoo Wednesday, Oct. 30, 1996 in San Diego. Bai Yun, and her male partner, Shi Shi, go on display at the zoo Nov. 1.](/wp-content/uploads/2016/05/20090729__20090730_A02_ND30PANDASHELFp1.jpg?w=263 "20090729__20090730_A02_ND30PANDASHELF~p1.JPG")
Getting your player ready...
SAN DIEGO — Bai Yun, the adult female panda at the San Diego Zoo, is pregnant — again.
Ultrasound tests have shown that Bai Yun is carrying one fetus, or maybe two, zoo officials announced Wednesday.
The 17-year-old panda has given birth to four cubs since coming to the zoo as part of a scientific exchange with China.
Bai Yun and Gao Gao mated in April, but panda keepers were unable to tell whether Bai Yun was pregnant until the ultrasound was taken.
Despite years of research, much about the panda reproductive system remains a mystery.
Based on previous pregnancies, keepers expect the birth to occur next month. Los Angeles Times
