31.   Somehow the drug stopped the development of fetal cells, usually during critical periods of limb formation.

32.   That November, on the same day George Bush was elected president, Freed performed the first fetal cell transplant in the United States.

33.   That has posed a problem for Freed and other researchers who have performed fetal cell transplants over the past decade with private money.

34.   The cells had the life spans expected of normal fetal cells, Stice reported.

35.   The fetal cell theory can also explain how men and women who have never given birth might have contracted the disease.

36.   The fetal cell was still in place under the outer skin of the egg.

37.   The fluid contains some fetal cells, which can be drawn out in the process called amniocentesis and analyzed to find out whether the fetus has some genetic diseases.

38.   The fetal cell theory also gave rise to the idea of doing autologous bone marrow transplants to treat scleroderma, said Furst, recalling the discussion.

39.   The fetal cells used for cloning had grown and divided in the laboratory for so long that they were near death from old age.

40.   The study neither proves that fetal cells cause scleroderma nor provides a full explanation of how such cells might cause the disease.

a. + cell >>共 936
human 5.69%
terrorist 3.63%
immune 2.97%
new 2.79%
holding 2.26%
normal 2.16%
epithelial 2.06%
living 2.02%
cancerous 1.98%
embryonic 1.86%
fetal 1.24%
fetal + n. >>共 104
tissue 21.41%
cell 15.09%
development 9.49%
pig 3.65%
growth 2.68%
brain 2.19%
monitor 1.95%
surgery 1.70%
viability 1.46%
death 1.46%
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