This paper describes a case of prenatal diagnosis for Wilson disease (
WD) carried out in an at-risk couple of Sardinian descent, following n
on-directive genetic counselling. Diagnosis was obtained by using eigh
t microsatellites located within or flanking the WD locus, six of whic
h were 100 per cent and two 50 per cent informative. The use of severa
l markers may limit the occurrence of misdiagnosis resulting from reco
mbination or instability of repeats.