@misc{indiciae7dced724c359,
  title = {Recurrent low second-trimester hCG.},
  author = {R G Best and J G Edwards},
  year = {1993},
  doi = {10.1002/pd.1970131216},
  url = {https://pubmed.ncbi.nlm.nih.gov/7513890/},
  note = {Source identifier: 7513890}
}