The Morris County prosecutor has charged 25-year-old Erin Dougherty and her 31-year-old boyfriend, Daniel Aratow, with unlawful disposal of medical waste.
The prosecutor's office says the couple went to Morristown Medical Center seeking treatment for Dougherty on May 8.
Authorities say Dougherty was approximately 25 weeks pregnant when she suffered a stillborn birth on May 6 and the baby was discarded in a trash receptacle outside their East Hanover home.
The trash was picked up on May 7 and the rubbish was taken to a Pennsylvania landfill.
Dougherty and Aratow are free on $7,500 bail each.
Authorities say the investigation is ongoing.