@misc{indiciaeaa8545e96f19,
  title = {Umbilical artery velocity waveforms before and after chorionic villus sampling.},
  author = {R M Ibba and G Monni and G Olla and A Cao},
  year = {1994},
  doi = {10.1002/pd.1970140906},
  url = {https://pubmed.ncbi.nlm.nih.gov/7845886/},
  note = {Source identifier: 7845886}
}