BBC correspondent in Dhaka
The Bangladeshi conjoined twin who survived a separation operation in June has been allowed home from hospital in the capital Dhaka.
Hassan's case reflects well on the nation's medical care, doctors say
The four-month old boy, known only as Hassan, was separated from his twin, Hussain, who died five days after the operation.
Hassan is the first survivor of any such operation in Bangladesh.
Local surgeons performed the operation in a private hospital and doctors say Hassan's survival reflects positively the development of medical care in the country.
The twins were born joined at the chest in April this year in the south-western town of Khulna, where their father is a rickshaw puller earning less than $2 a day.
The possibility of an operation arose when the local branch of the Islami Bank hospital stepped in.
Ruhul Amin, the surgeon who carried out the operation, said it was very complicated.
"We had to separate the liver and the lower part of the sternum," he told the BBC.
After Hussain's death, Hassan was kept under close medical surveillance given the low success rate of separations.
"After three months, Hassan has now fully recovered from the operation and this is the first case in Bangladesh where at least one child survived," Dr Amin said.
The mother, Jasmine Begum, did not believe she would see either of her sons alive again.
She plans to place her child in a madrassa (Islamic school) "because it's Allah who gave him back to me".
Dr Amin said that of about 400 conjoined twins around the world who had been separated only 51 had survived.
The survival of Hassan is good news in a country where people often complain about poor medical care with the wealthy going to India, Thailand or Singapore for treatment.