Zoo's Lun Lun to deliver fourth Giant Panda cub - Dallas News | myFOXdfw.com

Zoo's Lun Lun to deliver fourth Giant Panda cub

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ATLANTA -

Lun Lun, a 15-year-old giant panda, is expecting! A June ultrasound shows her fourth cub, and what would be the first giant panda born in the U.S. in 2013, according to Zoo Atlanta.

Animal Management and Veterinary Teams estimate that Lun Lun could deliver as soon as two to three weeks. Veterinarians base their assessment of Lun Lun's birth window on data from a similar ultrasound performed when Lun Lun was expecting her third cub, Po, in 2010.

As of the first week of July, the fetus is 1.08 centimeters long -- which is consistent with a delivery date approximately two weeks from now.   

During the past several days, Lun Lun has shown behavioral signs indicative of either pregnancy or pseudopregnancy. Hormone assays conducted by Dr. Dave Kersey, an expert in giant panda endocrinology from Western University of Health Sciences, will continue to shed light on her condition.

 "We're thrilled about the possibility of a fourth cub for Lun Lun, but we remain cautiously optimistic at this point. Giant panda cubs are extremely fragile, and the chance remains that the fetus does not go to term," said Raymond B. King, President and CEO.

"A birth would be another success for our giant panda program, and we share our optimism with our fellow U.S. zoos housing this iconic species and with our colleagues at the Chengdu Research Base of Giant Panda Breeding in China."

Lun Lun was artificially inseminated in March 2013 with the assistance of Dr. Copper Aitken-Palmer, an expert in giant panda reproductive physiology from Smithsonian's Conservation Biology Institute.  

Lun Lun and 15-year-old male Yang Yang have three previous offspring: male Mei Lan, 6 and now a resident of the Chengdu Research Base of Giant Panda Breeding; male Xi Lan, 4; and male Po, 2. All three were the products of artificial insemination, and all three were the only giant pandas born in the U.S. in their respective birth years.

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