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  • Title: Impact of maternal serum alpha-fetoprotein screening on antenatal diagnosis.
    Author: Brock DJ.
    Journal: Br Med J (Clin Res Ed); 1982 Jul 31; 285(6338):365-7. PubMed ID: 6178461.
    Abstract:
    An analysis has been made of indications for amniocentesis in the Edinburgh area from 1979 to 1981. About 5% of all mothers underwent the procedure. Among 2137 amniocenteses, 37% were performed on mothers 35 years old or more, and 30% on patients with raised serum alpha-fetoprotein. The total number of amniocenteses and the categories have been stable for the past three years. As a result of amniocentesis 104 pregnancies were terminated, 66 of which (63%) followed a raised maternal serum alpha-fetoprotein indication, while only 10 (9.6%) were in mothers aged 35 or more. There were a further 12 terminations based on raised serum alpha-fetoprotein but where no amniocentesis had been thought necessary. Even when figures for anencephaly are excluded from the analysis, maternal serum alpha-fetoprotein screening was responsible for detecting 35 out of 63 (56%) abnormal fetuses. This constitutes a strong case for the continuation of alpha-fetoprotein screening programmes. From an analysis of indications for amniocentesis in the Edinburgh area from 1979 to 1981 it is concluded that alpha-fetoprotein screening programs for detection of neural tube defects should be continued. Raised maternal serum alpha-fetoprotein levels accounted for 30% of the amniocenteses and for 63% of the resulting selective abortions. Previous studies have shown that alpha-fetoprotein screening is accepted in this area by over three quarters of pregnant women and has an 80% detection rate, a higher acceptance and detection rate than that of prenatal screening for Down's syndrome.
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