Preimplantationstester
Preimplantationstester is a term used in reproductive medicine to describe tools, methods, or entities designed to evaluate embryos before implantation during assisted reproductive technology. The term is not widely used as a fixed designation in English and is commonly associated with preimplantation genetic testing (PGT) and embryo viability assessment. The aim is to identify embryos with genetic abnormalities or to select those with the best chance of a healthy pregnancy.
Most widely used forms are preimplantation genetic testing for aneuploidy (PGT-A), testing for monogenic diseases (PGT-M),
Typical workflow involves ovarian stimulation and egg retrieval, fertilization, culture to the blastocyst stage, biopsy of
Limitations include mosaicism, which can lead to discordant results between biopsied cells and the entire embryo;