There are the laws that prohibit the marriage between close relatives in many countries. This can also be called eugenics. Even though involuntary is included in such eugenics, almost no person objects to it, for the birth quality is quite low. There are so many definitions of eugenics and relative practices. We can also find differences in the Encyclopedia of Bioethics .
All definitions show a close relationship between eugenics and medical genetics.
Following the development of genetics and the growing amount of genetics technology applied in the genetics practice, we must justify how to use them, and what are the ethical reasons to use them. It is important to have a contemporary definition of eugenics for the genetics in debate. We need only one definition or a new one of it. It can make the concept of thinking clear and justify the practice involved in contemporary genetic medicine. What is right depends not just on the facts but on what is meant by eugenics.