A time-lapse video has captured the first 100 days of two giant panda cubs born in the United States.
A research centre in southwest China has brought 14 newborn panda cubs together for the first time.
Almost two weeks since Edinburgh Zoo announced it was on ‘red alert’ for the birth of a panda cub there’s still no sign - yet.
Officials at Edinburgh Zoo said they are continuing to monitor the hormone levels of giant panda Tian Tian whose pregnancy is "atypical".
– Edinburgh Zoo spokeman
In terms of Tian Tian’s possible pregnancy, we’re not out of the game yet although she’s keeping us on our toes.
Her hormones are following an atypical pattern, with lots of rises and dips, which make timings much harder to predict.
We are continually analysing hormone and protein samples and, based on the latest results, our external experts now believe Tian Tian may have experienced her secondary progesterone spike two weeks later than the results previously available suggested.
As Edinburgh Zoo waits to see if giant panda Tian Tian is pregnant they have revealed that her mystery pregnancy is especially difficult to verify.
In a statement the zoo said: "Predicting pregnancy in giant pandas isn’t straight forward and we’re all rapidly learning that Tian Tian is a panda whose behaviour and physiology appears to be more complicated than most."
However the zoo remains hopeful that it could see a panda cub or two and say they will continue to monitor Tian Tian's hormones for more concrete evidence that she is pregnant.
A zookeeper at Edinburgh Zoo, where it is hoped that Tian Tian the giant panda may be preparing to give birth, has said that so far she is "sticking to her normal routine".
Sharon Hatton said that Tian Tian is "doing very well" but that the zookeepers are "not seeing any changes" to suggest that a birth is imminent.
Tian Tian is looking rather relaxed this morning, despite news that she may be about to give birth to the UK's first giant panda baby.
Tian Tian (meaning Sweetie) and Yang Guang (Sunshine) arrive in Scotland from Ya'an reserve in Chengdu, China.
The pair are introduced at Edinburgh Zoo and shown to a specially made "love tunnel", but they only go as far as wrestling.
The zoo launches a “panda-cam” so people across the world can watch the two giant pandas in the run-up to mating season.
After failing to show signs that she is ready to mate, Tian Tian is artificially inseminated.
The zoo's plans to carry out an ultrasound to see if Tian Tian is pregnant are shelved because it is deemed too risky to sedate her.
The Royal Zoological Society of Scotland reveals that hormone changes indicate Tian Tian may be pregnant.
A giant panda at Washington's National Zoo has given birth to her third cub today. Xiang Mei's second cub died last Autumn, while a cub in 2005 survived.
The zoo began monitoring Mei Xiang around the clock on August 7 in case she was pregnant. Zoo officials had said they could not be sure if the panda was pregnant because she would not permit them to examine her closely.
The sole male panda living in the UK turns 10 today with hopes his female partner is pregnant.
Yang Guang will be presented with an edible bamboo sculpture to celebrate his first decade on Earth.
Last week it emerged Tian Tian, the UK's only female Panda, could be pregnant.
Jo Paulson, the zoo's events executive, said: "Turning 10 is pretty special, so we wanted to organise lots of fun activities for visitors to help Yang Guang celebrate his birthday."
The pair arrived at Edinburgh Zoo from China in 2011 and have proved a popular attraction ever since.