Pre-ejaculate on a human penis
Pre-ejaculate, a more viscous higher flow variation
Pre-ejaculate (also known as pre-ejaculatory fluid or Cowper's fluid, and colloquially as pre-cum) is the clear, colorless, viscous fluid that emits from the urethra of a man's penis when he is sexually aroused. Viscosity is a measure of the resistance of a Fluid which is being deformed by either Shear stress or Extensional stress. In Anatomy, the urethra (from Greek ουρήθρα - ourethra) is a tube which connects the Urinary bladder to the outside of The penis (plural penises, penes The fluid is usually secreted by Cowper's glands during arousal, masturbation, foreplay or at an early stage during sex, some time before the man fully reaches orgasm and semen is ejaculated. A bulbourethral Gland (or Cowper 's gland) is one of two small Exocrine glands present in the Reproductive system of human males Masturbation refers to Sexual stimulation especially of one's own genitals ( self masturbation) and often to the point of Orgasm, which In Human sexual behavior, foreplay is a set of intimate psychological and physical acts between two or more people meant to increase Sexual arousal. Sexual intercourse, in its biological sense is the act in which the male reproductive organ (in humans and other higher animals enters the female reproductive tract An orgasm (sexual climax is the conclusion of the plateau phase of the sexual response cycle, and may be experienced by both males and females Physiological aspects Internal and external fertilization Depending on the Species, spermatozoa can fertilize The amount of fluid that the human male issues varies widely among individuals, from imperceptible amounts to a copious flow.
There have been no large-scale studies of sperm in pre-ejaculate, but some smaller-scale studies suggest that no sperm is present and thus pre-ejaculate is ineffectual at causing pregnancy. [1][2] This may account for the moderate effectiveness of coitus interruptus as a contraceptive method (failure rate of 27% for typical use and 4% for perfect use over one year). Coitus interruptus, also known as withdrawal or the pull-out method, is a method of Contraception in which a couple has Sexual intercourse [3] It is likely, however, that pre-ejaculate which follows a recent ejaculation will contain sperm, as some ejaculate is always left in the duct after orgasm. [4]
The same studies have shown the presence of HIV, which can lead to the disease AIDS, in pre-ejaculate. Human immunodeficiency virus ( HIV) is a Lentivirus (a member of the Retrovirus family that can lead to acquired immunodeficiency syndrome [1]
References
- ^ a b "Researchers find no sperm in pre-ejaculate fluid" (October 1993). Contraceptive Technology Update 14 (10): 154-156. PMID 12286905.
- ^ Zukerman Z. ; Weiss D. B. ; Orvieto R. (April 2003). "Short Communication: Does Preejaculatory Penile Secretion Originating from Cowper's Gland Contain Sperm?". Journal of Assisted Reproduction and Genetics 20 (4): 157-159. PMID 12762415.
- ^ Table of Contraceptive Efficacy
- ^ Withdrawal Method. Planned Parenthood (March 2004). Retrieved on 2006-09-01. Year 2006 ( MMVI) was a Common year starting on Sunday of the Gregorian calendar. Events 462 - Possible start of first Byzantine indiction cycle.
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