Q) What is the ruling regarding his religious status as a child? Should he be considered as a follower of same religion as the cell-donor?

A) He follows that religion of his care-taker as long as he remains a child same as when the prisoner child follows the conditions of his jailer. Then when the child grows up he follows whatever religion he chooses and should be treated accordingly. Even if he became unbeliever while the cell-donor was a Muslim, he is not considered as Murtad (converts out of Islam) because the cell-donor is not recognised as his father as mentioned previously.