A woman attending her high school prom gave birth in a restroom, left the baby in a trash can and returned to the dance floor with her boyfriend, authorities said.

Chaperones and medics tried to resuscitate the full-term baby but it was pronounced dead at a hospital.

The baby, a boy, was found Friday night by a maintenance worker who had been told there was blood on the floor of a toilet stall, said Monmouth County prosecutor John Kaye.

The worker found the trash can containing the body inside the stall.

Autopsy results were to be released today, Kaye said. “We’re treating it as a potential homicide,” he said. “In a case like this, the issue tends to be whether this was a stillborn baby or a live birth.”

After giving birth, Kaye said, the 19-year-old woman returned to the ballroom, danced with her boyfriend and even requested a song from the band at the prom.

The woman was taken to Bayshore Community Hospital in Holmdel, Kaye said. Her name was not released.