Procedure took place at Edinburgh park before an attempt at natural mating . The bears , Tian ng and Yang ##ian , were donated from donors in 2012 . are notoriously difficult to impregnate with ovulation just once a month . Tian Tian must be under 24 hour surveillance to monitor the pregnancy .
Procedure took place at Edinburgh Zoo before an attempt at natural mating . The bears , Tian Tian and Yang Guang , were donated from China in 2011 . Pandas notoriously difficult to impregnate with ovulation just once a year . Tian Tian will be under 24 hour surveillance to monitor the pregnancy .