Sperm with normal morphology of 2.5% means that the percentage of sperm with normal morphology is only 2.5%, while the other 97.5% of sperms are malformed. This condition is commonly seen in teratozoospermia, which usually does not have any obvious symptoms but can cause infertility, so it needs to be dealt with in time. Deformed spermatozoa is a condition in which less than 4% of the sperm are in normal form and the other 96% are malformed, such as head defects, defects in the neck or mid-section, and tail deformities. With 2.5% normal morphology of sperm, that means 97.5% of sperm are malformed. Too few normal morphology sperm are unable to accomplish fertilization and infertility symptoms can occur. Sperm normal morphology 2.5% should be promptly consulted to improve the relevant examination tests, such as sperm morphology analysis, gene sequencing, chromosome analysis, etc. If infertility is caused by abnormal spermatozoa, assisted reproductive techniques such as artificial insemination can be considered.