21.   She also said her former client was wronged when his wife made an unsuccessful attempt to become pregnant again by using embryos they created without his knowledge.

22.   Similar cases have arisen in Massachusetts, New York and Tennessee, and courts ruled an embryo cannot be used for reproductive purposes without the consent of both parents.

23.   She said that existing embryos should be used in stem cell research but that embryos should not be created explicitly for this purpose.

24.   The assembly was in June, before attention focused on whether human embryos should be used in scientific research, and did not take up the subject.

25.   The biological parents have to give their permission for their embryo to be used in this way.

26.   The court had already ruled that the woman could not use the embryos, the opinion explains their reasoning.

27.   There is widespread opposition to using such embryos to make babies.

28.   Thomson used embryos from two sources.

29.   To study stem cells, researchers use embryos destined to be destroyed anyway.

30.   Opponents insist it is wrong to use human embryos for research.