@misc{indiciae0b1b519b1f28,
  title = {Prolonged gestation.},
  author = {J R Esterly and E H Oppenheimer},
  year = {1973},
  doi = {10.1016/0002-9378(73)90313-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4691856/},
  note = {Source identifier: 4691856}
}