The infant has been returned to his family after authorities decided he became trapped because of an accident.
The unnamed mother claimed she fell pregnant following a one night stand - and then the father of the baby boy abandoned her.
The 22-year-old woman said she could not afford an abortion or cope with the stigma of being a single mother.
Now, the man has requested a paternity test and - if the baby is his - is ready to discuss with the woman how to support the child, according to an official in the Pujiang county propaganda office.
Baby 59 left hospital last night with his maternal grandparents, where his condition was said to be stable
New footage showed the baby boy with protective eye masks inside his incubator before he was allowed to go home
The footage shows Baby 59 in his incubator at Pujiang Hospital ahead of him being returned to his family
Being nursed back to health: The abandoned baby boy is pictured being fed in hospital after firefighters rescued him from a sewage pipe after he was apparently flushed down a toilet in Jinhua, Zhejiang Province
Police concluded that the 22-year-old single woman faces no charges, deciding she did not initially step forward because she was frightened, and that she gradually had a change of heart and began to tell the truth, said the official.
Last night, his maternal grandparents and police arrived at Pujiang Hospital to take the baby to a rural location, office director Chen Pandong said.
'The police department and the family member came together. This (was) definitely (done) in accordance with our rules for leaving the hospital,' added Chen.
Chinese media said she went to the shared bathroom in a residential complex when she felt abdominal cramps last Saturday and gave birth.
But she said the baby slipped into the sewer pipe and she was unable to free him.
She also claimed she was the first to raise the initial alarm and the watched the entire two-hour rescue in secret.
The 6lb 2.8oz baby boy was found abandoned in a sewage pipe in a building in the eastern city of Jinhua on Saturday afternoon, after residents reported hearing sounds of crying.
Firefighters had to remove the pipe and take it to a nearby hospital, where doctors carefully cut around it to rescue the baby inside.
Outside the apartment block, a man who saw the rescue, Xu Qiangding showed reporters a photo he took when the baby was found.
'When the rescuers came out, they cut the pipe open, and they took out the placenta which was still bleeding.
'We saw them pulling this out and thought it was an awful sight. It was clear what the thing inside the pipe was. The doctor said he was taken to the hospital for treatment.
The hospital's office director Chen Pandong confirmed that the baby had been taken to a rural location
Witness Xu Qiangding told reporters how he saw the baby being cut free from the sewage pipe
Mr Xu showed a picture he had taken on his phone of firefighters at work to save Baby 59
Reunited: The baby boy's mother - believed to be a 22-year-old single woman - has been found and is said to be with her baby in hospital
A nurse said the baby boy - who weighs 6lb 2.8oz - suffered a fracture to his skull but is now in a stable condition
The landlord of the building in Pujiang county told Zhejiang News that it was unlikely the birth took place in the restroom because there was no evidence of blood and she was not aware of any recent pregnancies among her tenants.
The baby was stuck in an L-shaped portion of the sewage pipe with a diameter of about 3 inches.
The video shows rescuers sawing off a section of the pipe along a ceiling that apparently was just below the restroom.
His eyes, face and body were covered in the filth of the pipe.
There are frequent reports in Chinese media of babies being abandoned often shortly after birth, a problem attributed variously to young mothers unaware they were pregnant, the birth of an unwanted girl in a society which puts greater value on boys or China’s strict family planning rules.
The case has raised discussion of China's lack of proper education about sex and birthing in many schools.