Men check their sperm to find out whether their own sperm is normal and whether infertility is caused by sperm. The main clinical tests for sperm are semen routine and sperm morphological analysis. The semen routine can mainly find out whether the sperm vitality is normal and whether the sperm motility rate is within the normal range. Sperm morphological analysis can find out whether the sperm morphology is normal and the percentage of abnormal sperm. These tests can detect the presence of malformed spermatozoa, weak spermatozoa, azoospermia, oligospermia and other diseases to see if male sperm is the cause of infertility.