@article{martikainen_2004, 
  title={Day 2 elective single embryo transfer in clinical practice: better outcome in ICSI cycles}, 
  volume={19}, 
  DOI={10.1093/humrep/deh197}, 
  publisher={Oxford University Press (OUP)}, 
  author={Martikainen}, 
  year={2004}, 
  month={Apr}
  }