[Radio-immune assay for determination of testosterone and representation of Y-bodies - sufficiently dependable methods for prenatal diagnosis of sex (author's transl)].

Results obtained from prenatal diagnosis of sex by radio-immunological determination of testosterone in amniotic fluid are compared with findings recorded by representation of Y-bodies and with results of chromosomal analysis. In no single case was a false result obtained from the two former methods, when used together. Hence, chromosomal analysis proved to be necessary only in something between five and eight per cent of all examinations.