After the Wenchuan Earthquake on May 12, all Chengdu Research Base of Giant Panda Breeding staff not only devoted themselves to relief work, but also continued working hard on giant panda breeding.
At 1 AM on May 22, base experts decided female panda Er Yatou had hit the peak of her estrus based on behavioral observations and hormone monitoring. So they introduced a male. However, both attempts failed and in the end she was artificially inseminated.
