Sperm, which is also referred to as semen, is the cloudy white body fluid that is emitted from the urethra of the penis during ejaculation. This happens when the penis becomes sexually aroused and stimulated through either sexual intercourse or masturbation. Most of the fluid in semen is made up of secretions from male reproductive organs. 65 per cent of the fluid is produced by the seminal vesicles, 30 to 35 per cent by the prostate and 5 per cent from the testicles and epididymes.
Semen contains citric acid, free amino acids, fructose, enzymes, phosphorylcholine, prostaglandin, potassium and zinc. The average volume of semen produced in a single ejaculation varies from 2 to 5 ml. The semen from a single ejaculation may contain between 40 million and 600 million sperm, depending on the volume of the ejaculate and the length of time since the last ejaculation.
After ejaculation, the latter part of the ejaculated semen coagulates immediately, forming globules, while the earlier part of the ejaculate typically does not. After a period typically ranging from 15 - 30 minutes, prostate-specific antigen present in the semen causes the decoagulation of the seminal coagulum. It is postulated that the initial clotting helps keep the semen in the vagina, while liquefaction frees the sperm to make their journey to the ova.
Semen contains citric acid, free amino acids, fructose, enzymes, phosphorylcholine, prostaglandin, potassium and zinc. The average volume of semen produced in a single ejaculation varies from 2 to 5 ml. The semen from a single ejaculation may contain between 40 million and 600 million sperm, depending on the volume of the ejaculate and the length of time since the last ejaculation.
After ejaculation, the latter part of the ejaculated semen coagulates immediately, forming globules, while the earlier part of the ejaculate typically does not. After a period typically ranging from 15 - 30 minutes, prostate-specific antigen present in the semen causes the decoagulation of the seminal coagulum. It is postulated that the initial clotting helps keep the semen in the vagina, while liquefaction frees the sperm to make their journey to the ova.