Previous recommendations by the American Society forReproductive Medicine (ASRM) and the Society for Assisted Reproductive Technology(SART) (Practice Committee of the American Societyfor Reproductive Medicine & the Practice Committee of the Society forAssisted Reproductive Technology, 2013) recommended carrier screening forCFTR-related cystic fibrosis and spinal muscular atrophy (SMA-gene SMN1) common variants in all donors. The gene discussed is SMN1; the disease is muscular atrophy.