fetal tissue implant definition of fetal tissue implant in the Free Online Encyclopedia.

fetal tissue implant or fetal cell therapy, implantation of tissue from a fetus fetus, term used to describe the unborn offspring in the uterus of vertebrate animals after the embryonic stage (see embryo ). In humans, the fetal stage begins seven to eight weeks after fertilization of the egg, when the embryo assumes the basic shape of the
..... Click the link for more information. into a patient. In experimental procedures, fetal brain tissue has been implanted in the brains of patients with Parkinson's disease Parkinson's disease or Parkinsonism, degenerative brain disorder first described by the English surgeon James Parkinson in 1817. When there is no known cause, the disease usually appears after age 40 and is referred to as Parkinson's disease.
..... Click the link for more information. so that the fetal tissue will supply chemicals lacking in the diseased brain, but such therapy failed to show significant benefits in a controlled study. Because fetal cell therapy uses tissue from freshly aborted fetuses, the procedure is controversial. Both the Reagan Reagan, Ronald Wilson (rā`gən), 1911–2004, 40th president of the United States (1981–89), b. Tampico, Ill.
..... Click the link for more information. and G. H. W. Bush Bush, George Herbert Walker, 1924–, 41st President of the United States (1989–93), b. Milton, Mass., B.A., Yale Univ., 1948.

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..... Click the link for more information. administrations banned the use of federal funds for fetal-tissue research that used tissue from aborted fetuses. President Clinton Clinton.

1 Town (1990 pop. 12,767), Middlesex co., S Conn., on Long Island Sound; settled 1663, set off from Killingworth and inc. 1838. The school that later became Yale opened here in 1702.
..... Click the link for more information. lifted the ban early in his administration. The successful transplantation of eggs from fetal ovaries in experiments with mice led to the suggestion in 1994 that human fetal ovaries or eggs taken from such ovaries could be implanted in infertile women, a possibility that troubled many ethicists and others. Some fear the use of what they call "fetal farming," the conception in vitro or in vivo of embryos solely for their medical usefulness. Others point to the potential benefits in the treatment of Alzheimer's Alzheimer's disease (ăls`hī'mərz, ôls–)
..... Click the link for more information. and Huntington's diseases Huntington's disease, hereditary, acute disturbance of the central nervous system usually beginning in middle age and characterized by involuntary muscular movements and progressive intellectual deterioration; formerly called Huntington's chorea.
..... Click the link for more information. , and possibly in cases of nerve injury.