A doctor is under investigation for infant trafficking in Fuping county, Northwest China's Shaanxi province, Chinese Business View reported.

The doctor surnamed Zhang is suspected of trading new born babies at a maternal and child health care hospital in Fuping county after a baby boy went missing on July 18.

It is said that Zhang asked the parents to "give up the boy" with a fake test report showing the mother had syphilis and hepatitis, which would infect the baby and "bring huge economic pressure" to the family.

The baby's father, surnamed Lai, who has just graduated from primary school, said he believed the doctor and signed his name on the delivery record as he was too nervous and confused. The record said the baby had deformity, which was not mentioned by doctor Zhang earlier. The baby was reportedly removed before the mother could see him.

"Zhang said the baby had infectious disease and I shouldn't get close to him," the father said. "I only looked at him through the delivery room and kept taking care of my wife. After that she said the baby had been disposed and we never see him."

The mother of the baby, surnamed Dong, was proved to have no virus after a check at another hospital. And Zhang has not been seen since.

The family has been questioning the hospital and reported to the police. As of August 1, seven similar cases have been reported at the hospital involving Zhang.

Police in Fuping have confirmed the case as a group trans-provincial child trafficking. Three people have been arrested and doctor Zhang is under investigation.