But since more babies should be born without DS, despite more diagnoses of DS due to more tests, shouldn't the negatives also increase (more) after the amniocentesis? I expect both positives and negatives to increase with the increase in negatives being more than the increase in positives.
Thank you that's my point better put. Unless they uncover a hidden pool of Downs cases (unlikely) this was an increase in false positives leading to an increase in amniocentesis leading to an increase (1/300) of preventable foetal deaths. I think.
