Mutation Severity of FBXO43 Determines Spermatogenic Outcome and Informs Precision ART Strategies
Different types of FBXO43 mutations generate distinct infertility phenotypes through a dose‐dependent mechanism: Truncating mutations cause profound meiotic arrest and NOA, whereas hypomorphic missense mutations permit meiotic completion but result in severe teratozoospermia with high aneuploidy.