title: Detection of beta subunit HCG in plasma of IUD users as an indication of frequency of conception.
abstract: 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.
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000097:blood*; D005260:Female; D006801:Humans; D007435:Intrauterine Devices, Copper; D007986:Luteinizing Hormone / Q000097:blood; D011247:Pregnancy; D011258:Pregnancy Tests; D011374:Progesterone / Q000097:blood; D011863:Radioimmunoassay
chemical_list: D006063:Chorionic Gonadotropin; D011374:Progesterone; D007986:Luteinizing Hormone