Science of genetics has shown a rapid progress recent years as the Human Genome Project was completed. As a result of this study it is determined that the human genome consists of 23.000 genes. Another important discovery made after this study is that approximately 10 million single nucleotide polymorphisms (SNP) can be found in every person. These polymorphisms cause the variety and differences among people.  While some SNP’s may cause diseases, some may increase the tendency for some diseases. Genetic consulting becomes very important at this point. Genetic consulting determines a personal treatment way via genetic test opportunities offered by the developing technology. Genetic consulting especially becomes more important for those who have a background of genetic diseases in family history. These people can be informed by genetic consulting about which genetic problems he or she has or has not and which diseases this problem may cause. Patients can be led to an efficient treatment method for this disease that has a possibility to occur. Parents, who a genetic problem has been spotted in their babies by prenatal diagnosis method during pregnancy, may also take the advantage of genetic consulting for healthy and objective information based on scientific facts, about the future of their pregnancy.