Received July 17, 2022
Accepted December 01, 2022

Objective: To compare IVF and ICSI fertilization rates in normospermic or mild teratospermic patients. Methods: Eighty-one couples, performing their first IVF cycle were included. Cases with male age >50, a women’s age >43 years or with less than 4 mature oocytes were excluded. Semen samples were evaluated using WHO 1999 criteria. Only were included those which have a concentration number ≥20 x 106 spermatozoids/ml, motility A ≥25% and motility A+B ≥40%. We considered mild teratospermia Kruger values between 10-13 and normal Kruger ≥14, and patients there were divided in two groups: G1: K=10-13 and G2: K≥14.In every IVF cycle, sibling oocytes were divided in two groups, assigned to IVF or ICSI treatment. Results: No significant differences were evident when comparing IVF fertilization rate (66.1±38.4 vs. 71.6±33.3); complete IVF fertilization failure (17.2% vs. 7.7%) or cycles with ≥67% IVF fertilization rate (69.0% vs. 67.3%), respectively for groups 1 and 2. To compare IVF vs ICSI, all patients were included. ICSI fertilization rate was higher (69.6±35.1 vs 84.5±18.5). There was no case with complete fertilization failure with ICSI vs. 9/81 (11%) with IVF. Conclusion: Our results show the advantage of performing FIV+ICSI to those patients with IVF indication that undergo an artificial reproduction treatment for the first time.