Only 2 couples involved in embryo mix-up

(see related) (ANSA) - Rome, April 17 - Only two couples are involved in the mix-up of embryos that led to a woman getting pregnant with twins that are not genetically hers, the head of the health authority that Rome's Sandra Pertini hospital belongs to said Thursday. "The results of the tests carried out and procedural checks on the operations during the embryo transfers exclude the involvement of other couples," said Rome ASL B authority chief Vitaliano De Salazar.