[The distinction of elevated alpha-fetoprotein levels in amniotic fluids for antenatal diagnosis of genetic defects].

Among 1017 amniotic fluid samples of 831 patients were 110 cases (10,8%) cases with sanguivolent amniotic fluid in the first portion and a second clear specimen. Contrary to the trend to analyse only the second clear share, we tested both samples. 110 pregnancies are analysed. The abortion risk (1,8%) in this group and the rate of prematurity (8,1%) are not increased. Retrospectively we were able to demonstrate a fetus injury in one case. The different analysis enable us to a conclusion about the fetal risk.