Beksaç, Sinan, Tülay Özlü, Sevim Balcı, Mehmet Alikaşifoğlu, and Nur Çakar. 2006. “Selective Feticide of The Aneuploid Fetus in a Twin Pregnancy: A Case Reports”. Gynecology Obstetrics &Amp; Reproductive Medicine 12 (1). Ankara, TR:54-57. https://gorm.com.tr/index.php/GORM/article/view/565.