French zoo officials were doubly delighted on Tuesday on learning that their pregnant panda is expecting not one but two cubs at the weekend.
A final scan has revealed that Huan Huan, who is on loan to Beauval zoo in central France from China with her male partner Yuan Zi, is expecting twins on Friday or Saturday.
The impending birth will be the first of a panda in France.
It was announced with great fanfare on July 26 after a first scan, which appeared to show the nine-year-old bear -- who arrived in Beauval in 2012 after intense, high-level negotiations between Paris and Beijing -- was carrying a single cub.
But on Tuesday veterinarians assisted by two Chinese panda reproduction specialists noticed a second foetus.
"The problems are only just starting!," the zoo's director Rodolphe Delord joked.
His sister Delphine Delord, the communications director, acknowledged that the situation would be "fragile", with mothers often known to abandon the second cub.
"We're doing everything possible to ensure it goes well," she said.
Huan Huan's carers will place the second cub in an incubator and rotate the tiny bears every two hours with their hundred-kilo mother, Beauval's head veterinarian Baptiste Mulot said.
Breeding pandas is notoriously difficult.

Source: AFP