@misc{indiciae4aea01219cad,
  title = {Estrogens in pregnancy.},
  author = {M Levitz and B K Young},
  year = {1977},
  doi = {10.1016/s0083-6729(08)60522-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/343361/},
  note = {Source identifier: 343361}
}