@misc{indiciaeed756fede254,
  title = {Predicting pregnancy failure in 'empty' gestational sacs.},
  author = {D A Nyberg and R A Filly},
  year = {2003},
  doi = {10.1002/uog.33},
  url = {https://pubmed.ncbi.nlm.nih.gov/12528153/},
  note = {Source identifier: 12528153}
}