en Original Article Original Article <strong>Background: </strong>Recent reports have suggested that ultrasound-guided embryo transfer (UG-ET) might improve pregnancy rates.<br> <strong>Objective:</strong> To determine whether transabdominal UG-ET is a useful tool for increasing pregnancy and implantation rates in patients undergoing IVF or ICSI.<br> <strong>Materials and Methods: </strong>A prospective randomized clinical trial was conducted in 180 patients in order to compare embryo transfer under abdominal ultrasound-guidance (n=90) with embryo transfer by clinical touch method (n=90).<br> <strong>Results:</strong> The Clinical pregnancy rate was 21.1 % in the ultrasound-guided group and 15.5 % in the clinical touch group (p =0.3). The implantation rate in the ultrasound guided group was 11.1% while this was 7.2% in the clinical touch group (p =0.12). The percentage of difficult transfer was not significantly different in both groups, this was 8.9% in the ultrasound-guided group and 13.3% in the clinical touch group (p =0.47).<br> <strong>Conclusions:</strong> Although the clinical pregnancy and implantation rate are higher in UG-ET group than the clinical touch group, but this difference was not statistically significant. Ultrasound-guided embryo transfer (UG-ET), Pregnancy rate, ART 95 98 http://ijrm.ir/browse.php?a_code=A-10-549-287&slc_lang=en&sid=1 Robab davar r_davar@yahoo.com Yes Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Sedighe Ghandi No Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Naeimeh Tayebi No Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran