A sperm viability test at age 38 of 58% is generally within the normal range. Sperm viability refers to the proportion of live sperm to total sperm. The reference range for sperm viability is 58% or more, so a 38 year old sperm test with a 58% viability rate is generally within the normal range. Sperm viability test is usually performed by eosin staining test, after the death of sperm, the integrity of the cell membrane is damaged, resulting in the head of the dead sperm will be stained red, usually counting a total of 200 sperm in order to count the sperm viability. A sperm viability of 58% usually does not affect fertility, but reducing the frequency of sexual intercourse does not improve sperm quality and is not conducive to conception. If there is any abnormality in the test, it is necessary to go to the hospital as soon as possible, and the doctor will formulate an individualized diagnosis and treatment plan according to the specific condition, so as not to delay the condition.