Sakar, Mehmet Nafi, Deniz Balsak, Sureyya Demir, Mehmet Sukru Budak, Ali Emre Tahaoglu, Sinan Emre Gungor, Emrullah Akay, and Bulent Demir. 2020. “The Ability of a Single Serum Progesterone Measurement to Predict the Prognosis of First Trimester Pregnancy”. Gynecology Obstetrics &Amp; Reproductive Medicine 26 (1). Ankara, TR:1-5. https://doi.org/10.21613/GORM.2019.942.