September 22, 2026 · Fertility and sterility · DOI: 10.1016/j.fertnstert.2026.09.010

FMR1-Associated Diminished Ovarian Reserve: Reduced Oocyte Yield Without Loss of Per-Embryo Ploidy

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The authors aimed to investigate whether diminished ovarian reserve in FMR1 premutation carriers is solely a quantitative issue or if it also affects per-embryo chromosomal competence, particularly regarding embryo aneuploidy risk. Their findings indicate that while FMR1 premutation carriers have reduced ovarian reserve and lower early embryology outcomes, the per-embryo euploidy rates are comparable to matched non-carriers, suggesting that the chromosomal competence of embryos is not impaired despite a lower oocyte yield.

Yuval Fouks, Brittany Morse, Catharyn Stern, Michal Kirshenbaum, Maria Lalioti, Denny Sakkas

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