@misc{indiciae4489fe77539c,
  title = {Delayed ovulation and monozygotic twinning.},
  author = {O Bomsel-Helmreich and E Papiernik-Berkhauer},
  year = {1976},
  doi = {10.1017/s000156600001388x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1031545/},
  note = {Source identifier: 1031545}
}