RT Journal Article SR Electronic T1 Amniotic cell 4-methylumbelliferyl-alpha-glucosidase activity for prenatal diagnosis of Pompe's disease. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 148 OP 149 DO 10.1136/jmg.13.2.148 VO 13 IS 2 A1 Fensom, A H A1 Benson, P F A1 Blunt, S A1 Brown, S P A1 Coltart, T M YR 1976 UL http://jmg.bmj.com/content/13/2/148.abstract AB Using a simple fluorometric assay for alpha-glucosidase activity of cultured amniotic cells, we have monitored two pregnancies from families at risk for Pompe's disease. The fetus was judged to be affected in one, the pregnancy being terminated and unaffected in the other. The accuracy of these predictions was confirmed. These results suggest that this assay allows accurate prenatal diagnosis of Pompe's disease, three weeks after diagnostic amniocentesis.