The plane had arrived in NY from Charlotte at 10:45 p.m. Monday and was being prepared for a morning departure. One of the attendants noticed a large amount of toilet paper in one of the plane's lavatory toilets.
The fetus was reportedly between five and seven months old.
FOX5 NY reports that the cleaning crew found the baby inside the bathroom of the plane, in the toilet.
The fetus was found at about 7 a.m. on an American Airlines flight that had landed Monday night from Charlotte.
An under-developed fetus was discovered on an American Airlines flight at LaGuardia Airport.
American Airlines confirmed an investigation is underway. "We will release determination when investigation is complete".
In a statement to Radar, the Office of the Chief Medical Examiner in NYC said they are "investigating" the discovery.
LaGuardia Airport tweeted "American Airlines flights at Terminal B may experience some delays to an out of service aircraft".
The airline also told WNBC that the incident has had "no major impact to our operation this morning".