ABSTRACT
As a medical geneticist, one first considers preimplantation diagnosis (PID) in the context of the established methods of prenatal diagnosis (PND) (Müller 1990, Miny et al. 1995). The techniques used for this purpose, and the phases before and during pregnancy in which it can be employed, are shown schematically in fig. 1. As a general rule it should be possible to carry out a PND examination as early as possible without endangering the pregnancy or the health of the unborn child, and the result of the examination should be a very reliable. On the basis of these criteria, PID can be considered favourably. Timetable for the use of prenatal examination methods https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429453441/a8003938-e4a9-4ab0-b4c0-fa2d8473a4b6/content/fig8_1_1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
