@misc{indiciaedc15ded39cff,
  title = {When to avoid creating surplus human embryos.},
  author = {J D Biggers and M C Summers},
  year = {2004},
  doi = {10.1093/humrep/deh476},
  url = {https://pubmed.ncbi.nlm.nih.gov/15319382/},
  note = {Source identifier: 15319382}
}