Duru, Namık Kemal, Kazım Gezginç, Emre Karaşahin, İbrahim Alanbay, Ulaş Fidan, and İskender Başer. 2008. “The Evaluation of Multiple Birth Rates For Patients Who Had IVF-ET Procedure in Our Clinic”. Gynecology Obstetrics &Amp; Reproductive Medicine 14 (2). Ankara, TR:77-79. https://gorm.com.tr/index.php/GORM/article/view/440.