Lun Lun, Zoo Atlanta's giant panda, is pregnant once again

• Zoo Atlanta
• Giant Panda Lun Lun

Zoo Atlanta will soon become home to yet another little and adorable bundle of joy baby panda this month.

The Grant Park zoo has announced that Lun Lun, its 15-year-old giant panda, is expected to have her fourth cub sometime during the next few weeks. According to Atlanta's panda experts, it would the first giant panda born in the United States in 2013.

Here's some background about the pregnancy:

Over the past several days, Lun Lun has been exhibiting 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.

In case you were wondering, Zoo Atlanta does have Lun Lun's ultrasound. You can see the tiny little cub right here.