# Embryo Selection **Domain:** Reproductive Medicine / Genetics / Bioethics **Doc Type:** Technical Concept Node **Maturity:** Developed ## Definition **Embryo selection** is the choice among embryos for transfer during assisted reproduction, potentially using morphology, developmental timing or genetic testing as decision inputs. It changes which embryo is selected; it does not clone a donor, guarantee a complex phenotype or reconstruct a particular person. ## Corpus Context [[wiki/Selected Reproduction|Selected Reproduction]] places embryo selection within the broader category of selection over reproductive inputs. [[wiki/Genotype–Environment Reconstruction|Genotype–Environment Reconstruction]] goes further by treating post-conception development as part of the target system. ## Evidence Boundary Predictive power depends on the trait, the test and the population. Complex behavioral traits remain polygenic, pleiotropic and developmentally contingent. ## Sources / Provenance - [UK Human Fertilisation and Embryology Authority — Pre-implantation genetic testing](https://www.hfea.gov.uk/treatments/embryo-testing-and-treatments-for-disease/pre-implantation-genetic-testing-for-monogenic-disorders-pgt-m-and-pre-implantation-genetic-testing-for-chromosomal-structural-rearrangements-pgt-sr/)