TY - JOUR T1 - Investigating Relationship between Saliva Estriol to Progesterone Ratio and Preterm Delivery JF - International Journal of Pharmaceutical Research and Allied Sciences JO - Int J Pharm Res Allied Sci SN - 2277-3657 Y1 - 2016 VL - 5 IS - 3 SP - 264 EP - 269 UR - https://ijpras.com/article/investigating-relationship-between-saliva-estriol-to-progesterone-ratio-and-preterm-delivery ER -