Prenatal diagnosis of Duchenne muscular dystrophy by DNA analysis.

Linkage studies have been carried out in 20 families segregating for Duchenne muscular dystrophy and eight prenatal diagnoses performed, including six first trimester diagnoses and one twin pregnancy. The results of the restriction fragment length polymorphism (RFLP) analysis suggest that not all the possible RFLPs need to be used and a strategy for carrier detection studies is proposed.