@misc{indiciae435e349337b0,
  title = {Beta-endorphin and parturition.},
  author = {J E Fletcher and T A Thomas and R G Hill},
  year = {1980},
  doi = {10.1016/s0140-6736(80)90803-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6101760/},
  note = {Source identifier: 6101760}
}