A spokeswoman for North Glasgow University Hospitals NHS Trust said: "Earlier this year the Assisted Conception Unit in the Glasgow Royal Infirmary participated in two instances of pre-implantation genetic diagnosis, for which it is specifically licensed.
"It is important to stress that these procedures were carried out to test embryos where there was a risk of passing on a genetic disease.
"The procedures were not used to select an embryo so stem cells from the resulting baby's umbilical cord could be used in the treatment of an existing affected sibling - the license that we have does not extend to this type of procedure.
"Each case was funded on an individual basis through specific funding from the Board. An established funding source for pre-implantation genetic diagnosis is not yet in place.
"In both cases, the families concerned wish to remain anonymous. The Trust has fully complied with these wishes, has not given any specific details of their current condition or treatment and we will continue to respect this request for confidentiality."
Notes to Editor:
The license to carry out this procedure was given by the Human Fertilisation and Embryology Authority.For further information please contact Emma Gregory on 0141 201 3964.