Fertility tests begin on Edinburgh Zoo panda Tian Tian
The test results allow staff at the zoo to judge the right time to put Tian Tian together with Yang Guang in the hope of producing panda cubs.
Last year the pair’s first mating season together attracting worldwide interest but ended in disappointment. 

It is believed Tian Tian’s season will arrive between March and May and will only last around 36 hours making the tests crucial.
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However, in 2012 they failed to mate after Tian Tian’s hormone levels dropped and became too low to mate.
The pair showed interest in each other at the time – sometimes taking the form of wrestling – but failed to mate successfully.

Source: http://www.deadlinenews.co.uk/2013/01/14/fertility-tests-begin-on-edinburgh-zoo-panda-tian-tian/
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We wish you good luck Tian Tian!!

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