ACX
Links For December 2025
Scott's monthly roundup of interesting links covering AI policy developments, technology news, cultural observations, and scientific research from December 2025.
51 min read 7,822 words
A thread through the archive
embryo selection
Essays tagged “embryo selection”. Follow an idea across the archive.
Essays on embryo selection
6 essaysACX
My Responses To Three Concerns From The Embryo Selection Post
Scott responds to three concerns about embryo selection: embryo personhood rights, loss of trait diversity, and the ethics of preventing disabilities, arguing that none of these objections are fatal to the technology.
23 min read 3,516 words
ACX
Suddenly, Trait-Based Embryo Selection
Scott analyzes the sudden emergence of commercial trait-based embryo selection services, discussing both the scientific validity and ethical implications of selecting embryos for health outcomes, intelligence, and physical traits.
56 min read 8,637 words
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Who Does Polygenic Selection Help?
Scott Alexander argues that using polygenic screening to select low-risk embryos can be considered as preventing genetic disorders, drawing parallels with other accepted preventive practices.
8 min read 1,185 words
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Obscure Pregnancy Interventions: Much More Than You Wanted To Know
Scott Alexander examines obscure pregnancy interventions that may improve child outcomes, rating them by evidence quality and potential impact.
80 min read 12,326 words
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Welcome Polygenically Screened Babies
Scott Alexander discusses the birth of the first polygenically-screened baby and explores the current and potential future applications of this technology in IVF.
9 min read 1,321 words