Definition of the problem: Recently, ”Dolly” has been confirmed by cloning several other mammals. In January 1999 it was even reported that Korean researchers first of all had cloned the first human embryo. In the following article some basic biological and technical aspects of modern cloning strategies, such as embryo splitting and nuclear transplantation, will be described. Subsequently, a short critical analysis will discuss the ethical problem of cloning human beings. Since the German Embryo Protection Act from January 1991 substantial (...) progress in cloning technology has been made, so that the principal question now is whether the Act is still sufficient to forbid human cloning or whether it should be revised. Arguments and conclusion: With advanced technical progress human cloning now seems to be possible. From the ethical point of view, the cloning of human beings should be rejected, as it offends the fundamental value of human dignity. On the other hand, the German Embryo Protection Act is antiquated and does not provide the required protection. This article may stimulate further discussion in the fields of ethics and jurisdiction, especially regarding to the Embryo Protection Act. (shrink)