Tian Tian and Yang Guang have both bred before, although not with each other.

BBC: Edinburgh Zoo pandas: Enclosure swap ahead of mating

Tian Tian and Yang Guang will be given the opportunity to meet up to three times for short 15 to 30 minute intervals, following the pattern of how pandas would come together briefly in the wild to mate.

BBC: Edinburgh Zoo's pandas may be ready to mate

Keepers hope Tian Tian and the male Yang Guang mate naturally, but will also attempt artificial insemination.

BBC: Edinburgh Zoo's pandas may be ready to mate