Präimplantationsdiagnostik und der Status des Embryos

Abstract

The debate about preimplantation genetic diagnosis (PGD) has put new life into the discussion about the various preimplantation stages of the human embryo. This article explains the embryological foundations for the description of preimplantation stages, provides an interpretation for the embryological findings (the embryo as a dynamic, self-organising system – twin development and individuality – the embryo as a person in becoming), and discusses problems with respect to individuality and personality of human embryos.