Genetically engineered foetus. Abstract computer artwork of a genetically engineered human foetus seen over the Earth. Within the blue pillar on which the foetus rests is some DNA (deoxyribonucl- eic acid). DNA is a complex molecule made of two helical linked strands whose genetic code controls the development and functioning of the cells in the human body. DNA can be manipulated by gene therapy to replace missing or damaged genes, specific sequences of genetic code. In the future it may be possible to engineer foetuses to create designer offspring. Alternatively this could represent an artificial womb.