The wait goes on for possible sign of panda cubs

Edinburgh Zoo's female panda Tian Tian is still looking like she could give birth any day.

Her keepers say she continues to show all the positive hormonal and physical signs of being pregnant and in recent days apart from becoming increasingly sensitive to noise she's become rather grumpy and aggressive.

The panda enclosures will remain closed off to the public for at least the next five days during which time those looking after Tian Tian hope she will have a panda cub.

It may seem rather strange to have such uncertainty surrounding a pregnancy and over such an extended time but panda gestation periods are hard to determine and in the case of Tian Tian experts say she is an especially complicated case.

Her behaviour and blood levels are being monitored 24-hours a day so if she shows any signs of going into labour or having lost her babies keepers will be able to tell straight away.

There's apparently a bet among staff at the zoo that she'll keep us guessing till this weekend. The wait goes on.