One of the U.S. capital's resident giant pandas may be pregnant, officials at the Smithsonian Institution's National Zoo said on Monday, but warned fans of the black-and-white mammals not to get baby fever just yet.
Mei Xiang, who was artificially inseminated on March 1, is showing the signs a giant panda would show if she were pregnant, but those signs are also identical with the hormonal and behavioral changes of a false pregnancy, a zoo spokeswoman said on Monday.
"Probably within the next month we should know if she is pregnant or if she is pseudopregnant," spokeswoman Devin Murphy said in a telephone interview. "The only way to definitely tell is to see a fetus on an ultrasound."