@misc{indiciae2baa2dad64bc,
  title = {Maternal postural challenge as a functional test for cervical incompetence.},
  author = {G Wong and D Levine and J Ludmir},
  year = {1997},
  doi = {10.7863/jum.1997.16.3.169},
  url = {https://pubmed.ncbi.nlm.nih.gov/9166812/},
  note = {Source identifier: 9166812}
}