Assessment of human chorionic gonadotropin (HCG) levels during luteal phase in women using intrauterine contraception.

@article{Aubert1977AssessmentOH,
  title={Assessment of human chorionic gonadotropin (HCG) levels during luteal phase in women using intrauterine contraception.},
  author={J. Aubert and M. C. Boria and M. L. Stone and J. Reyniak},
  journal={Contraception},
  year={1977},
  volume={16 6},
  pages={
          557-62
        }
}
Abstract 103 Blood specimens, obtained during the luteal phase from women using various types of intrauterine contraceptive devices (IUD) were examined for the presence of hCG. A sensitive radioreceptor assay for hCG was used. In contrast with recent reports, all specimens examined were negative for hCG. Hence, we question the validity of the hypothesis that the presence of an IUD may allow for fertilization, but cause degeneration of the blastocyst. 
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SERUM LE LS OF PRE CY-SPECIFIC ~I-GLYCOPRO IN (SP ) AN CH I IC G OTROPIN (~2~ICG) IN WO N 1 USING INT TERI VICE
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