Newswise, Nov. 1, 2006 Amniocentesis – the most commonly prescribed invasive test performed during pregnancies in the United States – today has a significantly lower risk of pregnancy miscarriage than rates published in the 1970s and 1980s. (0.5% or 1 in 200 pregnancies) Researchers at Mount School of Medicine conducted the research in conjunction with other institutions in the FASTER Research Consortium. The consortium includes including Columbia University, University of Utah and IHC Perinatal Centers, Swedish Medical Center, William Beaumont Medical Center, University of Texas Medical Branch, Montefiore Medical Center, University of Colorado Health Science Center, New York University Medical Center, Tufts University, Brown University, University of North Carolina.