A downcast father has to make a difficult choice - choosing which of his twin daughters to save as they both face certain death from a life threatening ailment.

Michael Wagner’s 3-year-old twin girls, Binh and Phuoc, are both suffering from a rare Alagille syndrome, a disease which affects the function of their livers, meaning they both require a liver transplant.

The Metro UK reports that there is only one match for the two girls who were adopted from Vietnam by Michael and his wife, Johanne, when they were 18-months-old, the donor being Michael himself.

Because of this handicap, he will be only to donate to only one of the twin as there has not been any other donor.

Doctors at the Toronto General Hospital, USA, say they are running out of time as the operation, a procedure which involves part of the liver being removed from the patient, has to commence in the next two weeks and the parents have to make the near where the family live, will make the arduous decision based on which girl is the best candidate though a search for another donor is continuing.

The parents of the girls have created and blog and a Facebook page in order to help with the search for a live liver donor.