Hammersmith Hospital in the context of "Queen Charlotte's and Chelsea Hospital"

St Mary's Hospital is a teaching hospital in Paddington, in the City of Westminster, London, founded in 1845. Since the UK's first academic health science centre was created in 2008, it has been operated by Imperial College Healthcare NHS Trust, which also operates Charing Cross Hospital, Hammersmith Hospital, Queen Charlotte's and Chelsea Hospital and the Western Eye Hospital.

Until 1988 the hospital ran St Mary's Hospital Medical School, part of the federal University of London. In 1988 it merged with Imperial College London, and then with Charing Cross and Westminster Medical School in 1997 to form Imperial College School of Medicine. In 2007 Imperial College became an independent institution when it withdrew from the University of London.

Imperial College School of Medicine (ICSM) is the undergraduate medical school of Imperial College London in England and one of the United Hospitals. It is part of the college's Faculty of Medicine and was formed by the merger of several historic medical schools. Its core campuses are located at South Kensington, St Mary's, Charing Cross, Hammersmith and Chelsea and Westminster.

Preimplantation genetic diagnosis (PGD or PIGD) is the genetic profiling of embryos prior to implantation (as a form of embryo profiling), and sometimes even of oocytes prior to fertilization. PGD is considered in a similar fashion to prenatal diagnosis. When used to screen for a specific genetic disease, its main advantage is that it avoids selective abortion, as the method makes it highly likely that the baby will be free of the disease under consideration. PGD thus is an adjunct to assisted reproductive technology, and requires in vitro fertilization (IVF) to obtain oocytes or embryos for evaluation. Embryos are generally obtained through blastomere or blastocyst biopsy. The latter technique has proved to be less deleterious for the embryo, therefore it is advisable to perform the biopsy around day 5 or 6 of development.

The world's first PGD was performed by Handyside, Kontogianni and Winston at the Hammersmith Hospital in London. "Female embryos were selectively transferred in five couples at risk of X-linked disease, resulting in two twin and one singleton pregnancy."

Imperial College Healthcare NHS Trust is an NHS trust based in London, England. It is one of the largest NHS trusts in England and together with Imperial College London forms an academic health science centre.

The trust was formed in October 2007 by the merger of Hammersmith Hospitals NHS Trust and St Mary's NHS Trust and their integration with Imperial College Faculty of Medicine. It currently manages five hospitals: Charing Cross Hospital; Hammersmith Hospital; Queen Charlotte's and Chelsea Hospital; St Mary's Hospital and Western Eye Hospital. In 2019/20 Imperial College Healthcare had a turnover of £1.3 billion, employed approximately 13,000 people and treated about 1.3 million patients.