Abstract
Preimplantation diagnosis (PID) comprises all the relevant diagnostic procedures for the investigation of genetic, structural, or numerical changes of the genetic information in spermatozoa and oocytes as well as in embryos after in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI). PID of oocytes is well established in Germany for the above-mentioned indications. PID at the embryonic level, i.e., trophectoderm biopsy of blastocysts, is possible in centers with proven expertise in reproductive medicine and human genetics. A high risk for genetic disease in the child or a high likelihood for stillbirth or miscarriage is a prerequisite for PID. A specialized ethics committee is required to look into each case before making a decision. While PID is still under development in Germany, it has been a well-established technology worldwide for 24 years. International experience in PID and the resulting implications are discussed in this article.
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