CHRISTIAN DARKIN / SCIENCE PHOTO LIBRARY CHRISTIAN DARKIN / SCIENCE PHOTO LIBRARY
Three parent IVF. Computer illustration representing IVF (in vitro fertilisation) using three parents. This technique is used when the mother has mitochondrial disease. The genetic material from a fertilised egg is implanted into the egg of a third parent that has had its genetic material removed. The donated egg provides healthy mitochondria, the cell organelles that produce energy.
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