Jodie and Mary
Jodie and Mary were conjoined twins, born in Manchester in 2000. Doctors predicted that, if no intervention occured, Jodie and Mary would both die in around three months. They also said that if you separated them, one of the twins would certainly die, while the other twin would probably live.
There was much debate about the ethics of this particular case, particularly because the Catholic parents, like the church itself, were against intervention in this case as it would be the same as murder. The operation was successfully performed, against the wishes of the parents, and Jodie (the stronger of the twins) was given the organs needed for her survival. Mary died.
Theresa Ann Campo Pearson, an anencephalic infant known to the public as "Baby Theresa," was born in Florida in 1992. She effectively had "no brain", and doctors predicted that she would die within two weeks. Her parents decided that some good should come from her short life, and asked the doctors to use her organs to save other lives if possible.
The doctors were prevented from taking organs from Baby Theresa by Florida law. Doing so would involve killing Baby Theresa, which would be illegal. Baby Theresa died at 9 days old. By this stage, her organs were no longer of any use.
'Connor Peterson' never made it into this world alive. His mother, Laci Peterson (pictured), was killed in 2002 by her husband when she was 8 months pregnant ('Connor' was the name she had chosen for the baby). Their bodies were washed up on a beach in California
What is unusual about this case is that Scott Peterson, Laci's husband, was sentenced for a double murder (and found guilty - he was sentenced to death and is now on death row). The foetus here was treated as a human being.