Keepers at Edinburgh Zoo say their giant female panda Tian Tian's has not expressed interest in breeding despite her recent "grumpy behaviour".
Specialists are monitoring Tian Tian (Sweetie) closely after the zoo's male panda Yang Guang (Sunshine) started displaying signs that he to is ready to mate.
A spokeswoman said "Our female giant panda chose to sleep a lot of this afternoon so we let her do what her body was telling her it needed."
"She woke late afternoon and we could see bybehavioural analysis that she still had not yet reached peak."
"We hope she will continue to progress overnight and fully hit peak tomorrow morning.”