@misc{indiciae14bf8949e07f,
  title = {Towards easier childbirth.},
  author = {P A Walker and R H Martin and J Higginbottom},
  year = {1972},
  doi = {10.1016/s0140-6736(72)91750-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/4114732/},
  note = {Source identifier: 4114732}
}