WMAL.com

Mei Xiang may be pregnant again.

That’s according to officials at the National Zoo who say the panda’s hormone levels have started rising.

She was artificially inseminated twice in April from two different pandas.

The zoo says it doesn’t know for sure that Mei Xiang is pregnant, but that she has begun exhibiting behaviors such as nest building, choosing to spend more time in her den, sleeping more and eating less.

(Photo: nationalzoo.si.edu)