The first baby created from three genetic parents has been born in the UK.
To prevent inherited disease doctors created a "three-parent baby" by using a technique known as mitochondrial donation treatment (MDT).
The procedure, aimed at stopping a mother from passing on defective genes in the mitochondria - tiny power plants in cells that supply energy - to her child, involves giving a woman an IVF baby with DNA from three individuals.
Nuclear DNA was given to the child from the mother and father, which define key characteristics such as personality and eye colour.
They were also given a tiny amount of mitochondrial DNA provided by the "third parent".
