Sad and shocking -- and not surprising, given the number of teen pregnancies in this country.

A middle school janitor doing end-of-school cleaning Thursday found what appeared to him to be a human fetus in a trash bag inside a locker, police said.

Police are unsure what was in the trash bag, and its contents were turned over to the Dallas County Medical Examiner, Dallas police spokeswoman Sr. Cpl. Janice Crowther said.

"It is hard to determine what is in the bag,'' Crowther said. "If it is a fetus, it has been there quite a while.''

A janitor was cleaning out Ben Franklin Middle School on Thursday when he came across the trash bag inside a locker in the girls locker room.

It could be several weeks before the medical examiner makes a determination, Crowther said.

Did someone bring her abortion for show-and-tell? And will the school's solution be to stop allowing students to use lockers rather than encourage abstinence?

UPDATE: No fetus -- just rotten oranges.