%0 Journal Article %T Serum Progesterone and Serial ββ-hCG Levels in Predicting the Outcome of Early Pregnancies with Doubtful Viability: Prospective Research %A Yıldız, M. %A Çiçek, E.N. %A Demirayak, G. %A Genç, S. %A Şahin, O. %A Özkan, Y. %A Mihmanlı, V. %J European Archives of Medical Research %D 2023 %V 39 %P 146-152 %R