# Embryo Selection **Entity class:** Concept or analytic term **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/) <!-- BEGIN DEEP TIME CONTINUITY INTERFACE --> ## Deep-Time Continuity Interface This node is audited through [[wiki/Deep Time Continuity|Deep Time Continuity]] for future control-surface conversion, ontological drift, succession, irreversibility, due process, and resource incidence. The backlink records analytical relevance; it does not establish continuity intent in the present rule or institution. <!-- END DEEP TIME CONTINUITY INTERFACE --> ## Relationships <!-- BEGIN HUMANIZED RELATIONSHIPS 2026-09-11 --> This entry's documented connections are expressed in its definition and related-work routes, with provenance retained in the source-linked material. <!-- END HUMANIZED RELATIONSHIPS 2026-09-11 --> - **Historical contrast:** [[wiki/Robert L. Sinsheimer|Robert L. Sinsheimer]] argued in 1969 that future individual genetic intervention might differ from multigenerational state selection. [[wiki/The Prospect for Designed Genetic Change|His essay]] did not demonstrate contemporary embryo selection or show that selection and gene editing were interchangeable. - **Reproductive-technology context:** [[wiki/Lee Silver|Lee Silver]] discussed assisted reproduction and future human evolution in a PBS interview. [[wiki/Self-Directed Evolution|Self-Directed Evolution]] is the broader prospective question; selecting an embryo does not guarantee a specified trait. ## Simple Reminders, Quotations, and Thoughts > “In contrast, the new eugenics could, at least in principle, be implemented on a quite individual basis, in one generation, and subject to no existing social restrictions.” > **— Robert L. Sinsheimer**, *1969, “The Prospect of Designed Genetic Change,” Engineering and Science* [[reminders/Selection/Genetic Design Could Move from State Programs to Individual Decisions by Robert L. Sinsheimer|Genetic Design Could Move from State Programs to Individual Decisions by Robert L. Sinsheimer]] > "But we're going to control our evolution. Not nature. Not the environment. We are going to control the evolution of our species." > **— Lee Silver**, *PBS FRONTLINE, “Making Babies” interview* [[reminders/Evolution/We Will Control the Evolution of Our Species by Lee Silver|We Will Control the Evolution of Our Species by Lee Silver]]