"Result(s): In four patients, the concentration and motility of sperm obtained from freeze-thawed nocturnal emission were decreased compared with sperm from electroejaculation. Fertilization rates after ICSI using the nocturnal emission sperm were relatively low (45%). One clinical pregnancy was achieved after intrauterine insemination. Conclusion(s): The quality of sperm from nocturnal emissions is variable, but it can be used in assisted reproduction procedures to avoid aggressive procedures such as electroejaculation or testis biopsy."