The book represents a pre-clinical study on male reproductive system of male rats. Spark Capsule has content which possess aphrodisiac, anti-oxidants, supplements for sperms, boosters for androgen production. These properties may help to rejuvenate and revitalize male reproduction system as per the principle of Vajikaran mention in Ayurveda. Therefore this study was aimed to evaluation pharmacological action of Spark capsule on reproductive functions of male rats.