P. . Geran Malekkheili, S. . Zadehmodarres, and Z. . Heidar, “A comparative study of transabdominal and transvaginal ultrasound guidance on consequences of embryo transfer at Mahdiyeh hospital of Tehran in 2020: An RCT”, IJRM, vol. 20, no. 3, pp. 169–176, Apr. 2022.