Fertilization with the ICSI method (intracytoplasmic sperm microinjection) offers higher success rates to patients with teratozoospermia, by selecting a normal sperm and injecting it directly into the egg. What is Teratozoospermia? Teratozoospermia or teratospermia is an increase in abnormal sperm in a man’s semen. This is diagnosed when the sperm with abnormal morphology exceeds 96%