Quote:
Originally posted by SEC_Chick
The sources I have read put the miscarriage rate of normal babies between 1/100 and 1/400 for amnio, depending on the study, but averaging out to about 1/200 or 250, and is slightly higher for CVS (CVS also measuraby increasing risk for club foot and other limb deformities). Given that at my age, the risk of Downs is only about 1/1000 or so, it does not make sense to have it. We very likely will do the non-invasive screens, to prepare for possible circumstances.
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Right - your expected risk for Down Syndrome is 1/1000, but if you have the screens and they come back at 1/200, 1/90, whatever, that is when you make the choice. Well, actually, you often do a Level II ultrasound, and if the doc can't get comfortable, then you have the choice (along with genetic counselling). The thing about the screens is that there are a lot of false positives, so there's a big "oh my God" factor if it comes up positive. Lots of times the Level II can put your mind at its proper rest, but where it can't, there is the amnio as a choice. Also, you can find out your doctor's history re miscarriages post-amnio. You don't generally do an amnio unless the screens and/or Level II's indicate it's a potential choice, or unless you have some other medical condition that would indicate it.
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