The controversial organization Clonaid said Sunday that a cloned Japanese boy may be born as early as Monday.
Clonaid is funded by the Raelian Movement religious cult.
The cult maintains that two cloned girls have been born -- one each in the United States and Europe -- with their techniques. It has provided no scientific proof to back its claims.
Hideaki Numakura, the head of the movement's Japan branch, said he received news of the upcoming birth two days ago through Brigitte Boisselier, the president of Clonaid.
The baby is the clone of a boy who died in a traffic accident 18 months ago at the age of two, Numakura said. The parents, who reside in Japan, asked Clonaid to make a clone of their son, and the clone embryo was implanted in a surrogate mother overseas nine months ago, he said.
The couple is said to have paid $200,000 (23.6 million yen) to Clonaid for the procedure. They plan to live in Japan with the baby, Numakura said.
Although human cloning -- which produces the genetic duplicate of a person -- is banned in Japan, there is no law to punish those who undertake the cloning process overseas.
Numakura said Boisselier is planning to hold a news conference regarding the third baby on Thursday.
The Raelians, who believe that extraterrestrials created mankind, announced in late December that they successfully created the first ever cloned human, a baby girl called Eve.