@misc{indiciae3acedf034921,
  title = {The second twin.},
  author = {J S Samra and N Hampton and M N Fitzgibbon and M S Obhrai},
  year = {1990},
  doi = {10.1016/0140-6736(90)92395-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1976911/},
  note = {Source identifier: 1976911}
}