@misc{indiciaefed3acb60383,
  title = {Embryo definitions.},
  author = {A J McEvoy},
  year = {1988},
  doi = {10.1038/336198c0},
  url = {https://pubmed.ncbi.nlm.nih.gov/3194006/},
  note = {Source identifier: 3194006}
}