41.   The test involves removing a sample of the fluid surrounding the fetus in the uterus to obtain fetal cells for genetic analysis.

42.   The sheep cloned from a fetal cell did not have shortened telomeres, they reported.

43.   The use of fetal cells has become a subterranean issue among some anti-abortion groups, erupting occasionally on the Internet or taking hold in church groups.

44.   The vaccine must be grown in fetal cells because that was the primary medium used to develop and test it, Cary said.

45.   Their goal was to have the eggs take up the genes from the fetal cells and use them to direct the development of calves.

46.   This strategy requires fetal cells that can adapt to their new environment.

47.   This time the clones are Holstein calves, created from genetically engineered fetal cells.

48.   Treatments involving injection of fetal cells have shown some promise, but embryonic cells would in many ways be preferable.

49.   Two involve transfer of fetal cells to the mother and maternal cells to the fetus.

50.   When a woman is pregnant, fetal cells mix with her own blood.