Prenatal diagnosis of homozygous hypercholesterolemia was achieved at the 24th week of gestation by analysis of lipid values in a fetal blood sample obtained by a needle guided by ultrasound. These abnormal values were compared to values in blood obtained from normal fetuses at the same stage of gestation. After abortion, the diagnosis was confirmed by measuring LDL receptor activity on fibroblast cultures from a skin biopsy. The main advantages of this procedure over measuring LDL receptor activity on cultured amniotic cells are its simplicity and speed.
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