Evaluation of seminal parameters in the indication of in vitro fertilization or intracytoplasmic sperm injection in the treatment of the male factor fertility problem Avaliação dos parâmetros seminais na indicação da fertilização in vitro ou injeção intracitoplasmática de espermatozoide para o tratamento do fator masculino

In vitro fertilization (IVF) has proven to be an effective treatment for infertile couples. Over the years, assisted reproduction to treat male factor has grown, making new reproduction techniques necessary. Thus, in July 1992, the first pregnancy following intracytoplasmic sperm injections (ICSI) was reported. In method, one spermatozoon is injected into the cytoplasm of the oocyte. According to the World Health Organization, the minimal concentration of spermatozoa in the semen, using conventional IVF, is ≥ 5 x 106 /mL, and more than 30% of motility and 30% of normal morphology. Men with lower spermatic parameters should be submitted to ICSI. However, these values have been questioned in the literature and many clinics do not follow these parameters. Therefore, this study aimed to review the literature on sperm parameters used in the indication of conventional in vitro