@misc{indiciae1d06fbfa4b04,
  title = {Ovum factor and early pregnancy factor.},
  author = {H Morton and B E Rolfe and A C Cavanagh},
  year = {1987},
  doi = {10.1016/s0070-2153(08)60620-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/3330508/},
  note = {Source identifier: 3330508}
}