@misc{indiciae219aa74bce1c,
  title = {The implantation window.},
  author = {M J Harper},
  year = {1992},
  doi = {10.1016/s0950-3552(05)80092-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/1424330/},
  note = {Source identifier: 1424330}
}