[Comparison between different radioimmunological methods for the determination of steroid hormones].

17 beta-Oestradiol, Progesterone and Testosterone levels were assayed using different methods involving both I125 or H3 ad tracer in 15 female sera. Wide variations were observed only using the direct assay of 17 beta-Oestradiol, while the results of the three others assays were overlapped. None of the three methods used for the assay of Progesterone gave remarkably variations in results. One of the two direct methods used for Testosterone produced higher results than those obtained using previously extracted samples.