Iran's Guardians Council is reviewing amendments to the country's marriage law that specifies the rights of parents to marry their adopted children.
The amendments were approved by parliament in late September.
According to the changes, parents would be allowed to marry their adopted children but would have to get a court's permission that such a marriage is in the family's best interest.
There are currently no existing barriers to such marriages in Iran.
Supporters of the amendment say it will make it more difficult for parents to marry adopted children, but the move has been widely criticized as legalizing pedophilia.
In Iran, the minimum marriage age for girls is 13 and 15 for boys.
With reporting by Theguardian.com