Fetal loss rate after chorionic villus sampling and subsequent amniocentesis.

Here we review a group of 82 patients who underwent both chorionic villus sampling (CVS) and amniocentesis in the same pregnancy during the period May 1984-May 1988. A fetal loss rate of 2.5% is documented. This is not essentially different from the sum of fetal loss rates following each of the procedures separately (CVS, 1.9%; amniocentesis, 1.0%) established during the same period.