Currently 20 weeks pregnant and my last 2 screenings for Antibody M came back negative after being positive. Has this happened to anyone else? Was it significant?
My understanding of antibody screening is that there is a threshold level that determines whether a test is positive or negative. Could be that your levels were borderline and fell enough for the second test to be negative. Low levels of antibody M seem to be less likely to cause a problem with baby even if your screen was positive.
Re: Antibody M