Base rate information: Iceland's health system sees about 5000 viable pregnancies per year. This means that we'd expect about 4 births with Down syndrome per year. We see 1-2, meaning that about 2-3 pregnancies are terminated in Iceland due to Down syndrome each year.
That 2% statistic is a bit misleading. Those tests carry a non-negligible risk of miscarriage, so they are generally only prescribed if other tests show that a fetus is high-risk for one of various disorders. Furthermore, some women choose not to get the test even if they are high-risk, because they would never terminate. I’m not sure it’s possible to estimate the ‘true’ termination rate using these statistics.
