According to statistics from the American Society for Reproductive Medicine, 0.05 % of children conceived by women at age 20 have Downs 'Syndrome. That figure rises to 0.1 % among women age 35, 1 % among women who conceive at 40, and 5 % among women who conceive at 45.
根據美國生殖醫學會的統計，當孕婦年齡為 20 歲時，生出唐寶寶的比例僅 0.05 %，35 歲就上升至 0.1 %，40 歲則提升至 1 %，45 歲更飆至 5 %。