71.   Opponents argue that a cloned embryo is a human even before implantation in a womb, and to destroy it for research would be immoral.

72.   Scientists dispute his interpretation, saying that the retrieval is conducted when an embryo is only a week old, and still a microscopic ball of identical cells.

73.   Slack told the paper said using intact human embryos would not be possible because they would have to be killed.

74.   Scientists dispute his interpretation, saying the retrieval is conducted when an embryo is only a week old, and is still a microscopic ball of identical cells.

75.   Stem cells form when an embryo is four days old, and go on to make up every part of the body.

76.   Some anti-abortion groups oppose human embryo research because they consider such an embryo to be a human life.

77.   Taking stem cells from embryos, done when the embryos are the size of a period at the end of a sentence, does destroy them.

78.   Some groups consider embryos to be human and equate their intentional death to murder.

79.   Spevak acknowledged that the couple signed a contract with the clinic where the embryos were created, saying the embryos would be disposed of unless a court ordered otherwise.

80.   The appeals judges ruled Friday that an embryo is an embryo, whether created by fertilizing an egg with sperm, or by cloning.