Background: Iran like other middle east countries has a large number o
f major thalassaemics. Due to religious restrictions on abortion, the
routine prevention of the birth of thalassaemic children by this means
is not possible. The aim of this study is to describe an alternative
means to prevent the birth of thalassaemic children. Methods: From Jan
uary 1993 to January 1996, 100 000 people preparing for marriage were
screened for the thalassaemia trait, using CBC and HbA2 level measurem
ent. High risk couples were referred for further consultation regardin
g the disease and the means of its prevention. The proposed actions of
the couples regarding thalassaemia prevention were evaluated immediat
ely after consultation and then re-evaluated three months later. Resul
t: After the project had been running for three years the average of h
igh risk couple initially deciding not to many was 90% and no new case
s of thalassemia were detected in the children of the screened populat
ion. Conclusion: Where both members of the couple were trait-positive
their preferred choice was not to marry, rather than to marry and use
other or no methods of preventing a thalassemia affected child being b
orn to them. Cultural and religious ideas can affect such decisions an
d in some Islamic countries the establishment and use of a genetic cou
nselling centre can help prevent most of new thalassaemia cases.