National Zoo panda not pregnant, officials said

WASHINGTON (AP) -- The stork won't be visiting the National Zoo's pandas after all.
Two weeks after expressing hope that Mei Xiang might finally be pregnant, zoo officials said Wednesday that was not the case.
The giant panda was artificially inseminated May 2 after she failed to successfully mate with Tian Tian. Late last month, zookeepers said Mei Xiang was either pregnant or having a pseudopregnancy, and on Wednesday confirmed it was the latter.
Zoo officials said female pandas always have psuedopregnancies when they ovulate but don't conceive. The changes in behavior are identical to a real pregnancy. It took weekly ultrasound tests to confirm what was happening.
Mei Xiang and Tian Tian are the National Zoo's second pair of giant pandas and have been in Washington since 2001. They are on a 10-year loan from China.