@misc{indiciaeabec378c503d,
  title = {IUD compared with oral contraception in nulliparae.},
  author = {A Bergqvist and G Rybo},
  year = {1979},
  doi = {10.1016/s0010-7824(79)80050-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/509964/},
  note = {Source identifier: 509964}
}