ST. HELENS, Ore. -- The mother of a newborn girl discovered in a toilet on Valentine's Day was indicted Thursday on charges of attempted aggravated murder and assault, officials said.

Then, Jennifer Annette St. John, 21, turned herself in to police that night.

The infant has been released from Legacy Emanuel Hospital and is living with a foster family, the state Department of Human Services said.

St Helens Police

Police think St. John gave birth in a bathroom during her shift at the Meadow Park Health and Specialty Care Center in St. Helens. She was employed as a certified nursing assistant for less than three months.

St. John also has a three-year-old boy, who was placed in Human Services custody.

In a news release, St. Helens police said the investigation "revealed a conscious effort by the mother to kill the baby and to cover up her existence."

Blazek said another worker discovered the baby in the toilet water. Employees then called 9-1-1 and started to resuscitate the nearly full-term baby.

"Thanks to the heroic efforts and clinical competence of our staff," Blazek said in a statement, "the baby is expected to survive."

 More: Baby resuscitated by rescuers

To prevent unwanted newborns from being abandoned or killed, Oregon passed the "Safe Place for Newborns" law in 2001. The law allows a parent to leave an infant that is 30 days old or younger with an employee of a medical facility or law-enforcement agency -- no questions asked unless there are signs of abuse.

Greg Parker, a Department of Human Services spokesman, told The Oregonian newspaper that state child welfare workers had no problem finding a foster home for the girl.

"These folks are trained in being medically attentive to caring for newborns," Parker said. "Of course, we hope to work out something more permanent with family members."