Mei Xiang (Photo via National Zoo)

The National Zoo issued another update today on the status of female giant panda Mei Xiang, saying that as she enters another week of a possible pregnancy, she is becoming more reserved and spending much more time sleeping inside the panda habitat.

The zoo said July 26 that Mei Xiang, who gave birth to a cub last year that died within a week, might be pregnant again following artificial insemination treatments last spring. But given that panda pregnancies are only confirmed during the last few weeks of the six-to-eight-week period during which she might be carrying another cub.

In recent days though, Mei Xiang’s increasing disinterest in interacting with the outside world is giving panda researchers hope that she is pregnant once again. “In the past few days Mei has become much less interested in interacting with her keepers, and she continues to be very sensitive to noise,” the zoo writes in an update on its website. “She chooses to spend most of her time inside sleeping, and has rarely gone outside in the past few days. These behaviors are normal and even expected as we come to the end of a pregnancy or pseudopregnancy.”

Or maybe she’s just bored.