Yılmaz, Zerrin, Özge Özer, Derya Eroğlu, Filiz Yanık, and Feride İffet Şahin. 2012. “Importance of Routine Ultrasonography in Detecting Fetal Karyotype Abnormalities in Low Risk Pregnancies”. Gynecology Obstetrics &Amp; Reproductive Medicine 18 (1). Ankara, TR:1-6. https://www.gorm.com.tr/index.php/GORM/article/view/227.