(CNN) The human fetus discovered Tuesday in a plane lavatory at LaGuardia Airport in New York had a gestational age of 5 months, scientists at the city's Office of Chief Medical Examiner have determined.

The revelation came a day after an American Airlines crew found what they said appeared to be a fetus during a scheduled cleaning, according to the airline.

No further details about the scientists' findings were immediately available, spokeswoman Aja Worthy-Davis said Wednesday.

The plane arrived late Monday at LaGuardia from Charlotte, North Carolina, and the discovery was made around 5 a.m. Tuesday, airline spokesman Justin Franco told CNN.

The cleaning crew immediately contacted a manager, who contacted law enforcement, Franco said.

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