also found this to help mens sperm
Arginine is an amino acid found in many foods; it is needed to produce sperm. Most research shows that several months of arginine supplementation increases sperm count and quality and also fertility.However, some studies have reported that arginine helps few, if any, infertile men. Nonetheless, many doctors of natural medicine suggest 4 grams of arginine per day for several months to see if it will help infertile men.
hope this helps!
https://www.bodyandfitness.com/Information/Menhealth/infertility.htm