Heterophilic antibodies against rabbit serum causing falsely elevated gonadotropin levels.

@article{Berglund1989HeterophilicAA,
  title={Heterophilic antibodies against rabbit serum causing falsely elevated gonadotropin levels.},
  author={Lars G Berglund and N G Holmberg},
  journal={Acta obstetricia et gynecologica Scandinavica},
  year={1989},
  volume={68 4},
  pages={377-8}
}
Two cases are presented in which previously acquired antibodies against rabbits in the patient's serum caused falsely elevated hormonal levels in radio-immuno assays (RIA) based on rabbit antibodies to follicle-stimulating hormone (FSH) and human chorionic gonadotropin (hCG). The erroneous results led to unnecessary operative intervention and inconvenience for the patients.