21.   Once they had the fetal cells they grew them in the laboratory and added new genes, at least one of which was human.

22.   Other researchers have been attempting to isolate fetal cells from maternal blood by attracting their antigens, chemicals present on cell walls.

23.   Others said they saw no such effects and asked how good the PET scans were at showing the growth and proliferation of the fetal cells.

24.   Researchers and manufacturers prefer fetal cells because they can go through many more divisions than mature cells.

25.   Researchers in other states have found limited success using fetal cells to restore the adult brain cells that produce dopamine, a chemical that controls movement and coordi nation.

26.   Researchers are equally enthusi astic about the ruling, although they caution patients that fetal cell thera pies may not provide a cure for decades.

27.   Scientists could clone from undifferentiated fetal cells that were so immature that their developmental fate was undetermined.

28.   Scientists now believe that fetal cells implanted in the brain can replace the missing dopamine.

29.   Several of the original addicts received experimental treatments, such as fetal cell implants, that grew out of that research.

30.   She was cloned from a fetal cell that had a human gene and an innocuous second gene added as a marker.