%0 Journal Article %T Investigating Relationship between Saliva Estriol to Progesterone Ratio and Preterm Delivery %J International Journal of Pharmaceutical Research and Allied Sciences %@ 2277-3657 %D 2016 %V 5 %N 3 %P 264-269 %U https://ijpras.com/article/investigating-relationship-between-saliva-estriol-to-progesterone-ratio-and-preterm-delivery