Investigators at  King George's Medical University, Lucknow, India looked into the role of mucuna pruriens on semen profiles and biochemical levels in seminal fluid of infertile men. Sixty normal healthy fertile men undergoing infertility screening were given mucuna pruriens. The herbal supplement increased sperm production and improved sperm motility. They investigators say, "The present study is likely to open new vistas on the possible role of mucuna pruriens seed powder as a restorative and invigorating agent for infertile men."
   Comments: For long term use, I suggest not using more than one capsule of mucuna pruiriens extract 400 mg three times a week. For more info, see http://www.raysahelian.com/mucunapruriens.html.