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First baby pandas for UK? Maybe, zoo says.

Baby pandas could be weeks away if Edinburgh Zoo's Tian Tian is really pregnant. No baby pandas have ever been born in Britain.

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Danny Lawson/PA/AP
Female giant panda Tian Tian in her enclosure at Edinburgh Zoo on Friday, Aug. 9, 2013. The female giant panda at Edinburgh Zoo is showing encouraging signs she may be pregnant, according to keepers. Baby pandas have never been born in Britain.

Edinburgh Zoo is hoping for the pitter-patter of tiny paws, saying Friday that there are signs that one of its giant聽pandas聽may be pregnant.

The zoo said that nesting behavior and changes in protein and hormone levels suggest Tian Tian could be expecting a cub 鈥 or experiencing a phantom pregnancy, not uncommon in聽pandas.

The Scottish zoo said the signs "give us cause for encouragement," although Tian Tian has not cooperated with an ultrasound that could yield more information.

"Confirming a female聽panda's聽pregnancy is never straightforward and we would encourage people to try not to get too excited just yet," said Ian Valentine, director of the zoo's聽panda聽project. But, he said, "the overall picture is looking quite good."

If pregnant, Tian Tian should give birth in late August or early September.聽Panda聽pregnancies typically last about five months and result in one or two pink, hairless cubs.

Giant聽pandas聽have difficulty breeding, with females fertile for only two or three days a year. No giant聽panda聽cubs have ever been born in Britain.

The zoo artificially inseminated Tian Tian, or Sweetie, after she was reluctant to mate with male companion Yang Guang, or Sunshine. Keepers had tried to encourage the pair by building a "love tunnel" between their enclosures, but to no avail.

The two animals arrived from China in 2011 on a 10-year loan, and are the only聽pandas聽in Britain.

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