@misc{indiciae851dd992312a,
  title = {Cervical ripening after nitric oxide.},
  author = {J E Norman and A J Thomson and I A Greer},
  year = {1998},
  doi = {10.1093/humrep/13.2.251},
  url = {https://pubmed.ncbi.nlm.nih.gov/9557815/},
  note = {Source identifier: 9557815}
}