@misc{indiciae5ded54f2765e,
  title = {Fertility in twins.},
  author = {O Steeno and R Vlietinck},
  year = {1989},
  doi = {10.1017/s0001566000002853},
  url = {https://pubmed.ncbi.nlm.nih.gov/2609911/},
  note = {Source identifier: 2609911}
}