Purpose: The aim of this study was to determine intrauterine pathologies by hysteroscopy in patients who have undergone IVF-ICSI/ET (in vitro fertilization intracytoplasmic sperm injection / embryo transfer) and have failed, and to classify and evaluate these pathologies. Materials and Methods: This retrospective study was conducted between 2013 and 2019 at the Reproductive Endocrinology and Infertility Department of Çukurova University Faculty of Medicine, Balcalı Hospital. In this study, patients with primary or secondary infertility diagnosis who applied to the infertility outpatient clinic, who had previously undergone IVF-ICSI / ET and failed and therefore underwent hysteroscopy were included. Results: The hysteroscopy results of 228 patients included in the study were evaluated. Of these, 42.5% (n = 97) had normal hysteroscopic findings, 57.5% (n = 131) had abnormal hysteroscopic findings. When these abnormal findings were examined, the most common pathology was endometrial polyp 23.1% (n=36). Other findings were; intrauterine synechiae 20.5% (n =32), cervical pathology 18.6% (n =29), cervical stenosis 13.5% (n =21), uterine subseptum 10.9% (n =17), myoma uteri 4.5% (n =7), arcuate uterus 3.2% (n =5), T-shaped uterus 3.2% (n =5), intrauterine infection 1.9% (n =3), and vaginal septum 0.6% (n =1). Conclusion: Additional investigations for the cause should be performed in patients with implantation failure. The positive effect of hysteroscopy on IVF is related to its detection and treatment of lesions in the endometrial cavity. In addition, hysteroscopy can detect intrauterine pathologies missed by other research methods. Thus, it can contribute positively to the management of patients with IVF failure