Quitedrab taking action ie diagnostic testing as a result of blood screening results and the pregnancy then miscarrying is not the same as choosing to terminate a pregnancy on the basis of an identified statistical risk.
Surely that's obvious.
In the same way that women do not decide to terminate a pregnancy based on 'soft markers' identified by scans, but have further diagnostic testing.
CVS and amnios do carry a risk of miscarriage, but see CharleyParley's long post of 17 Oct at 2:58 which explains why the risk isn't a flat one - it varies considerably between consultants. It is very different to have a test done by a consultant whose procedures have never ended in miscarriage over a course of 12 years than by a less experienced consultant.
Also, unfortunately, there is a risk of losing a pregnancy to late miscarriage or stillbirth at ANY point. It's not possible to determine whether a late loss is the result of a procedure or 'just one of those things'. A diagnosis of an abnormality will suggest that the loss was caused by the procedure, but equally it may not have been.
So diagnostic procedures carry a risk of losing a pregnancy but the pregnancy may be lost without any procedures anyway, to be brutally frank (and as someone who has had multiple losses).
I do know someone whose pregnancy miscarried a week or so after an amniocentesis. Of course she was traumatised and will never know whether the procedure caused this. But equally she will never know whether she would have lost the baby anyway.
Choosing whether to have tests, what to have, what decisions to make are torturous, life changing decisions.
Suggesting that women choose to end a wanted pregnancy because of some statistical risk is offensive as well as being simply not true.