Gezginç, Kazım, Emre Karaşahin, and İskender Başer. “The Applicability and Use of Doppler Ultrasonography in The First Trimester”. Gynecology Obstetrics & Reproductive Medicine 13, no. 2 (August 16, 2007): 124–126. Accessed April 19, 2024. https://gorm.com.tr/index.php/GORM/article/view/532.