Seminal plasma is composed of the fluid and sperms from the vas deferens (about $10 \%$ of the total), fluid from the seminal vesicles (almost 60 percent), fluid from the prostate gland (about 30 percent) and small amount of mucous glands, especially the bulbourethral glands. It contains calcium, citrate ion, phosphateion, a clotting enzyme, profibrinolysin, fructose, citrate, inositol, prostaglandins, several proteins, etc.