@misc{indiciae28c42473fdd1,
  title = {Normal labor: mechanism and duration.},
  author = {John B Liao and Catalin S Buhimschi and Errol R Norwitz},
  year = {2005},
  doi = {10.1016/j.ogc.2005.01.001},
  url = {https://pubmed.ncbi.nlm.nih.gov/15899352/},
  note = {Source identifier: 15899352}
}