@misc{indiciaea499394a4df3,
  title = {Sequential analysis of spontaneous abortion. II. Collaborative study data show that gravidity determines a very substantial rise in risk.},
  author = {A F Naylor and D Warburton},
  year = {1979},
  url = {https://pubmed.ncbi.nlm.nih.gov/437160/},
  note = {Source identifier: 437160}
}