Veterinarians at the Smithsonian’s National Zoo in Washington, DC detected tissue consistent with fetal development during giant panda Mei Xiang’s (may-SHONG) ultrasound on Aug. 14. It is too early to determine if the tissue is a completely viable developing fetus as there is the potential that the fetus could be resorbed. If the fetal tissue continues to develop, veterinarians estimate that Mei Xiang could give birth within the next few days.
https://nationalzoo.si.edu/news/veterinarians-find-fetal-tissue-giant-panda-ultrasound