Sperm ejaculated on paper is yellowish, may have spermatophores or prostatitis. Under normal circumstances, the ejaculated sperm is slightly yellow and milky white, if it is slightly yellow, there is usually no big problem, if it is more yellow, consider whether there is spermatocystitis or prostatitis. Sperm stored in the seminal vesicles for too long may lead to sperm concentration or inflammation of the seminal vesicles, in which case the ejaculated sperm may be yellowish. If there is prostatitis, it may also be yellowish. Every time you ejaculate semen, a large portion of it is prostate fluid, which has white blood cells and can also cause yellowing. It is recommended to do a routine semen test as well as a prostate fluid test to confirm the diagnosis, and then carry out effective treatment after the diagnosis.