1.   Do you approve of doctors using human embryos for research?

2.   The government has banned all scientific research using human embryos.

3.   Last year, he used embryos to successfully clone two sheep.

4.   Although sperm has been frozen for years, and frozen embryos are now used routinely in infertility treatments, freezing delicate human eggs has bedeviled scientists.

5.   And Chancellor Gerhard Schroeder, in an article in the weekly Die Woche, said the case for using human embryos in research was not proven.

6.   Because the research, which uses human embryos discarded from fertility clinics, has become enmeshed in the politics of abortion.

7.   Alikani said the point was that she and Willadsen were using embryos that were designated for destruction.

8.   But such cells are at the center of an ethical controversy, with opponents saying it is immoral to use embryos for medical purposes.

9.   But while he uses embryos in his own fertility research, he said, he would rather see an embryo donated than destroyed.

10.   Dr. William E. Gibbons, who oversaw the work at the Jones Institute, said the procedure offered several advantages over using frozen embryos.