The Law:

• A prohibition on the transfer, for any purpose, of any human embryo (produced ex vivo, by whatever means) into the body of any member of a non-human species.
   
•  A prohibition on the production of a human-animal hybrid embryo by fertilization of human egg by animal sperm or of animal egg by human sperm.

Why We Need Legislative Action:

• New areas of biotechnology and scientific research are rapidly blurring the boundary between human and non-human life—by introducing human cells into animals and animal cells into humans. We have pigs with human blood. We have mice with partially human brains and mice that produce human sperm. We have embryos created with rabbit eggs and human DNA.
   
• A great deal of research involving both human and animal tissue is laudable and necessary for advancing science and medicine. But we must ensure that we do not violate human dignity by creating “hybrids” whose identity is in question or whose rights as a human person are undermined.
   
• As man-animal research progresses, two inviolable boundaries need to be in place:

1. No creation of a hybrid organism using animal eggs and human sperm or human eggs and animal sperm.
2. No implantation of a human embryo into the body of a nonhuman animal. Human embryos belong only in human wombs.

• We should not use animal wombs as human fetus farms. We should not grow human embryos in animal bodies, either for research or for growing human body parts.

What the Law Does:

• It ensures that biotechnology can advance without violating human dignity.
   
• It establishes two bright lines: no using IVF to create hybrid man-animal organisms and no using animal wombs to gestate or grow human beings.

What the Law Does Not Do:

• It does not affect research on non-human animals.
   
• It does not affect the current uses of xenotransplantation—such as using pig valves in human patients.
   
• It does not affect the vast majority of experiments that mix human and animal tissue—e.g., introducing human neural stem cells into mice brains. It only affects those two types of man-animal experimentation specified in the law.