@misc{indiciae568097fa452d,
  title = {Letter: Congenital abnormalities and first-trimester exposure to progestagen/oestrogen.},
  author = {J J Nora and A H Nora and A G Perinchief and J W Ingram and A K Fountain and M J Peterson},
  year = {1976},
  doi = {10.1016/s0140-6736(76)91455-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/55633/},
  note = {Source identifier: 55633}
}