71.   But the patent office has drawn the line on patenting of humans or human embryos themselves, saying it would not be constitutional.

72.   But the process is controversial, since it involves human embryos.

73.   But the research involves using cells grown from deliberately killed human embryos, and Congress has prohibited research on embryos.

74.   But the same techniques that could be used to create cloned children can also be used to create cloned human embryos for medical research.

75.   But their use is controversial because human embryos would have to be killed in giving up their stem cells for medical use.

76.   But the committee will unanimously recommend that California make an exception to permit the cloning of human embryos in connection with stem cell research.

77.   But the prospect of turning human embryos into spare parts factories touched a nerve in Congress, which several years ago banned federal funding for such research.

78.   Congress has passed restrictions on the use of federal money to finance research on human embryos.

79.   Congress, in banning the use of federal funds for research on human embryos, has favored the view that they are in the category of people.

80.   Congress already is on record as opposing scientific experiments on human embryos.