Nilsson C G, Lähteenmäki P, Luukkainen T
Int J Fertil. 1979;24(2):134-7.
One hundred and two women using an intrauterine copper device (Cu IUD) were studied for determination of HCG in blood plasma specimens obtained during the last 5 days of the menstrual cycle. HCG, LH, and progesterone were measured by radioimmunoassay (RIA). Two positive HCG values were found, indicating conception. The methods by which the frequency of fertilization during IUD use can be evaluated are discussed.
对102名使用宫内铜节育器（Cu IUD）的女性进行了研究，以测定她们在月经周期最后5天采集的血浆样本中的人绒毛膜促性腺激素（HCG）。采用放射免疫分析法（RIA）测定HCG、促黄体生成素（LH）和孕酮。发现了两个HCG阳性值，表明已受孕。文中讨论了评估使用宫内节育器期间受精频率的方法。
