Scott's monthly roundup of interesting links covering AI policy developments, technology news, cultural observations, and scientific research from December 2025.

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.

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.

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.

Scott Alexander examines obscure pregnancy interventions that may improve child outcomes, rating them by evidence quality and potential impact.

Scott Alexander discusses the birth of the first polygenically-screened baby and explores the current and potential future applications of this technology in IVF.