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Abstract : In spite of the notable advancement in the assisted reproductive technology, implantation failure still a considerable issue in the majority of infertile couples getting these treatments. Embryo transfer is important in assisted reproductive technology and has agreat effect on the implantation rates and pregnancy outcomes. To assess the effect of two different distances of embryo transfer site from fundal endometrial surface on the outcomes of intracytoplasmic sperm injection (ICSI) cycles. A total of 120 women who were candidate for ICSI/ embryo transfer in High Institute for Infertility Diagnosis and Assisted Reproductive Technologies / Al-Nahrain University and and infertility center at AKamal Al Samaraay hospital in Baghdad during the period from December 2021 to August 2022were equally assigned to two groups based on the distance between the fundal endometrial surface and catheter tip to investigate implantation, chemical and clinical pregnancy (group A:(10 -15) mm and group B: (16 – 20) mm, respectively). The patients in the group B had significantly higher implantation rate, chemical and clinical pregnancy rate as compared to the group A (p = 0.005, 0.03, 0.02, respectively). The rate of miscarriage had no significant differences between groups (p=0.3). In conclusion, the present study demonstrated that the depth of embryo deposition inside the uterine cavity at a distance of (16-20) mm below fundal endometrial surface have better effects on the pregnancy outcomes of ICSI cycles and can be considered as an important factor to improve the success of IVF cycles.

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