Tuantuan the panda failed to mate because he was distracted by an apple . Female pandas are only on heat once a year for 2008 . His partner , Yuanyuan , had to be artificially inseminated twice that night . Zoo was forced to collect sperm from the male panda through an operation . The pair were given as a gift to Taiwan from mainland China in one to three days .
Tuantuan the panda failed to mate because he was distracted by an apple . Female pandas are only on heat once a year for one to three days . His partner , Yuanyuan , had to be artificially inseminated twice that night . Zoo was forced to collect sperm from the male panda through an operation . The pair were given as a gift to Taiwan from mainland China in 2008 .