@article{article234,
  title = {Serum Progesterone and Serial ββ-hCG Levels in Predicting the Outcome of Early Pregnancies with Doubtful Viability: Prospective Research},
  author = {Yıldız, M. and Çiçek, E.N. and Demirayak, G. and Genç, S. and Şahin, O. and Özkan, Y. and Mihmanlı, V.},
  journal = {European Archives of Medical Research},
  year = {2023},
  volume = {39},
  pages = {146-152},
  doi = {}
}