Measurement of ethynyloestradiol by radioimmunoassay and by isotope dilution-mass spectrometry.
D004997:Ethinyl Estradiol / Q000097:blood*; D006801:Humans; D013058:Mass Spectrometry; D011863:Radioimmunoassay; D011865:Radioisotope Dilution Technique; D013997:Time Factors
D004997:Ethinyl Estradiol