The San Diego Zoo's newest panda cub is a girl.
Zoo veterinarians said they determined the 6-week-old panda's sex after conducting a recent exam.
"She is developing right along schedule," zoo spokeswoman Meg Sutherland-Smith said.
The cub is the fourth giant panda born at the zoo, all of them to 16-year-old Bai Yun. The father, Gao Gao, also fathered her two previous cubs.
Following Chinese tradition, the panda cub will receive a name after she is 100 days old.
Only about 1,600 giant pandas remain in the wild, and fewer than 180 live in captivity.