1.   Implanting cloned human embryos is already illegal in many countries but it will never be prohibited everywhere.

2.   At best, around half of cloned embryos develop to the point where they can be implanted, and only a tenth of these survive to birth.

3.   A biotechnology company announced Sunday that it had taken the first steps in producing cloned human embryos for use in growing replacement cells to treat diseases like diabetes.

4.   A cow egg stripped of its nucleus would be fused with a human cell to create a nonviable cloned embryo, from which embryonic stem cells would be taken.

5.   A cloned embryo has two sets of DNA, too.

6.   A chip that will automatically create hundreds of cloned embryos at a time is being developed by a Californian biotech company, New Scientist has learned.

7.   ACT called its first attempt at cloned embryos promising.

8.   According to Zanos, cloned embryos can be screened with currently available tools to detect any that are abnormal.

9.   Advanced Cell Technology has said it wanted to do this so-called therapeutic cloning to create cloned embryos of adult patients from which they could obtain replacement cells.

10.   But Bush this week endorsed a bill that would go much further, preventing the creation of cloned human embryos that are used for research, rather than reproduction.