[Ethical problems in human embryo research]

The problem of human embryo research is closely connected with the moral status of preembryo, embryo and fetus. Nevertheless the moral consensus on the status of this human entities is not feasible. Research activities in this fields are divided into two subcategories: In vitro research and research on implanted fetuses. Both needs to clarify one significant ethical distinction: it is the situation when the embryo is planned to be born, or to be perished. It is concluded, that the public discussion on this topic is necessary.