Louise and Andrew Riley's "miracle" baby son Elliott was born just after Christmas, making him the first child outside America to be successfully delivered as a result of a new type of genetic testing.
Mrs Riley, 37, said they opted for the £8,500 procedure because it was their "last hope" after "undergoing numerous tests and a failed cycle of IVF".
Elliott was born after chromosome screening, a relatively new procedure. It started by checking the six or seven chromosome pairs that most commonly produce faults in embryos.
The new technique, undertaken by doctors at Care Fertility, a private Manchester clinic, checks all 23 pairs of chromosomes and results in a higher success rate.
Genetic information from the embryo sample cells is also cross-matched against DNA samples taken from the parents to check for additional faults, a process called "parental support".
Early results suggest the combined method improves the chance of a viable ongoing IVF pregnancy from about 30 to 75 per cent.
