You heard it here first - Artificial insemination procedure in early hours of this morning. Must have hit peak hormone levels and they are making sure of mini-TianTians by usung belt and braces.
This was always planned as even a successful mating may not always result in conception. Statement includes a quote from the Chinese expert who is here orchestrating -
"The zoo spokeswoman said: "Natural mating was not attempted. Yang Guang had been interested and shown consistently encouraging behaviour, however based on his many years' experience, our Chinese colleague Professor Wang felt that although Tian Tian had displayed all of the correct behaviours, she had also displayed signs that told him she would not be conducive to mating."
I've seen a video of one of last year's introductions - she is a feisty female and got very cross with him for not being quite ready to do the needful. The staff had to lure them apart with treats to prevent bloodshed. If she remembers and does not fancy him this year, the staff would have to separate them before a real fight developed. That is a lot of hormone-filled panda to restrain!