Somatic cell therapy, Pre-Implantation Genetic Diagnosis (PDG) and Pre-Implantation Genetic Screening (PGS) are legal in the UK. They must only be carried out for medical reasons. Saviour sibling procedures were made legal in 2008 by the HFEA (The Human Fertilisation and Embryology Authority). The first successful saviour sibling operation in the UK took place in 2010.
Germ line therapy is still a very new technology. In the UK, it is illegal to perform this therapy on humans.
Embryology is governed by the Human Fertilisation and Embryology Act 1990. Human embryos produced for research purposes cannot be implanted into any woman's womb and must be discarded after 14 days. Egg, sperm and embryo storage in the UK is monitored by the HFEA.