Projected numbers of live born babies with Down’s syndrome for various screening strategies
| Per 100000 pregnancies | UK per year | |
|---|---|---|
| Total Down’s pregnancies | 144 | 1080 |
| Live births/observed population | 111 | 833 |
| Live births/amniocentesis > 35 years | 115 | 863 |
| Live births/maternal serum screening | 85 | 638 |
| Live births/maternal serum screening + fetal echocardiography | 81 | 608 |