@article{upadhyay_fonseca_2016, 
  title={Study of incidence of antiphospholipid antibody syndrome and low vitamin D levels as an etiological factor in recurrent pregnancy loss and their correlation}, 
  DOI={10.18203/2320-1770.ijrcog20163147}, 
  publisher={Medip Academy}, 
  author={Upadhyay and Fonseca}, 
  year={2016}
  }