Frozen embryo transfer (FET) is one of the important procedures in the treatment of infertile couples. While the general information regarding pregnancy outcomes of the fresh embryo transfer cycle has been documented, a paucity of studies has addressed the clinical factors influencing the pregnancy rate in FET. To evaluate the clinical factors that potentially influence the outcome of FET. A prospective study was performed that included 100 cases of (FET) performed at clinical centers for infertility in Iraq, between December2021-September 2022 at Kamal AL-Samarrai Hospital and Najaf Center for infertility and IVF. The clinical factors, baseline data, and CPR were collected. Pregnancy rate of patients involved in the present study was equal to 44.0, accordingly there was a significant difference between pregnant and non-pregnant patients regarding total transferred embryos 3.00±0.61 and 2.61±0.71 respectively, grade I embryos before freezing 2.91±0.61 and 2.24±0.87 respectively and after freezing 2.77±0.67 and 1.32±0.18 respectively and grade II embryos before freezing 0.10±0.04 and 0.37±0.10 respectively. (P≤0.05).