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Related to spermatozoa: azoospermia


 [sper″mah-to-zo´on] (pl. spermatozo´a) (Gr.)
a mature male germ cell, the specific output of the testes, which fertilizes the mature ovum (secondary oocyte) in sexual reproduction. It is microscopic in size, looks like a translucent tadpole, and has a flat elliptical head containing a spherical center section, and a long tail by which it propels itself with a vigorous lashing movement. Spermatozoa are produced in the seminiferous tubules of the testes. The developmental stages of the germ cell are the spermatogonium, spermatocyte, spermatid, and finally spermatozoon. When mature, the spermatozoa are carried in the semen. At the climax of coitus, the semen is discharged into the vagina of the female. A single discharge (about a teaspoonful of semen on the average) may contain more than 250 million spermatozoa. Only a few of these will travel as far as the fallopian tubes; if an ovum is present there, and if the head of a single sperm penetrates the ovum, fertilization takes place. adj., adj spermatozo´al.
Human spermatozoon: side view (in cross-section) and flat view.


Plural of spermatozoon.


[spur′mətəzō′ən, spərmat′-] pl. spermatozoa
Etymology: Gk, sperma + zoon, animal
a mature male germ cell that develops in the seminiferous tubules of the testes. Resembling a tadpole, it is about 50 μm (1/500 inch) long and has a head with a nucleus, a neck, and a tail that provides propulsion. Developed in vast numbers after puberty, spermatozoa are the generative component of the semen. See also spermatogenesis.
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SPERMATOZOON: Mature sperm cell


(sper?mat-o-zo'on) plural.spermatozoa [? + zoon, life]
The mature male sex or germ cell formed within the seminiferous tubules of the testes. The spermatozoon has a broad oval flattened head with a nucleus and a protoplasmic neck or middle piece and tail. It is about 51µm long and resembles a tadpole. It has the power of self-propulsion by means of a flagellum. It develops after puberty from the spermatids in the testes in enormous quantities. The head pierces the envelope of the ovum and loses its tail when the two cells fuse. This process is called fertilization.
See: illustration; sperm for illus.; fertilization


Microscopic cells about 0.05 mm long occurring in millions in seminal fluid. Spermatozoa are male GAMETES, carrying all the genetic contribution from the father and bearing either an X chromosome to produce a daughter, or a Y chromosome to produce a son.

Sperm or spermatozoa

The part of the semen that is generative—can cause fertilization of the female ovum.
Mentioned in: Condom


Patient discussion about spermatozoa

Q. how do i teat my no sperm count? i do not have a live sperm,how can i treat and have live sperm count

A. The treatment is done only at specialist centers, and consists first of evaluation of the reason for this condition (called azoospermia). If an anatomical malformation is found, it may be corrected, as well as medical conditions, and in some cases, direct extraction of sperms from the testes (called MESA) enables in-vitro fertilization.

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Q. What are some ways to get an erection? Libido and sperm are OK. I have had a problem with depression for years. I have always had a strong libido and I find that my ED has been a factor in my depression. Sexual relationships have helped me deal with my depression. What a MIRACLE! How can something so good be a remedy for mental problems. Oh! for a good stiff dick. I have considered a penile prosthesis implant but I'm still hoping for something better. Any information that might help would be greatly appreciated and I will remember you in my dreams and fantasies(sexual)for you ladies and I'll thank you studs. John

A. I am a female but my husband likes to think about a womans vagina. So maybe you should get a fake vagina try Adameve.com. And also try lubricants and other things, think about what turns you on.

Q. can hepatitis be transferred from fathers sperm when concieving a child? My partner has hepatitis C and he has gotten me pregnant will our baby have it too?

A. Here is taken from wikipedia (http://en.wikipedia.org/wiki/Hepatitis_C#Transmission) :

Sexual transmission of HCV is considered to be rare. Studies show the risk of sexual transmission in heterosexual, monogamous relationships is extremely rare or even null. The CDC does not recommend the use of condoms between long-term monogamous discordant couples (where one partner is positive and the other is negative). However, because of the high prevalence of hepatitis C, this small risk may translate into a non-trivial number of cases transmitted by sexual routes. Vaginal penetrative sex is believed to have a lower risk of transmission than sexual practices that involve higher levels of trauma to anogenital mucosa.

Mother-to-child transmission of hepatitis C has been well described, but occurs relatively infrequently. Transmission occurs only among women who are HCV RNA positive at the time of delivery; the risk of transmission in this setting is approximately 6 out of 100. Among women w

More discussions about spermatozoa
References in periodicals archive ?
1992, "The axonemal ultrastructure of spermatozoa from men with asthenozoospermia," Fertil.
Morphology of human spermatozoa according to Tygerberg's strict criteria and testicular spermatozoa had no predictive value for the outcome of day 2 and 3 embryo quality.
Do antisperm antibodies bound to spermatozoa alter normal reproductive function?
Differentiation of the spermatozoa takes place in cysts which are surrounded by extensions of the somatic cells.
The cysts containing late spermatids and spermatozoa, prior to spermiation, display a particular alveolar appearance due to the orientation of the spermatid heads facing the lobule walls and the bundles of flagella directed toward the seminiferous lobule lumen (Fig.
However these same protocols and modifications of these protocols have failed to preserve spermatozoa collected from the endangered blue fox (Alopex lagopus).
Using two successive methods of sperm preparation--density gradient method followed by swim-up method--we are able to obtain motile spermatozoa with no HIV nucleic acid detected.
1,2] Theoretically, this technique can be used to screen for the presence of male epithelial cells and spermatozoa on the internal surface of a used condom.
It involves extracting primitive male germ cells from a man unable to produce spermatozoa for transfer into the testes of laboratory rats or mice.
Because polyunsaturated fatty acids and phospholipids of the human spermatozoa are highly susceptible to peroxidation, FRs generated by spermatozoa may be involved in the production of spermicidal cytotoxic end products.
A 31-year-old woman gave birth to a baby girl last weekend using a tiny amount of spermatozoa taken from her husband, who suffers from a male chromosomal disorder that usually results in sterility or extremely low sperm count, thus preventing fertilization, a gynecologist said Thursday.
It's Alice in Wonderland written by Henry Miller on peyote, an imaginative postmodern fantasy where the protagonist transmogrifies into a spermatozoa swimming up a fallopian tube en route to Goddess Shakti for a little enlightenment, and the trendy new drug "black ice" (Amerika, nota bene, is editor of innovative Black Ice magazine and co-editor of Black Ice Books, as well as director of the fascinating electronic publishing site Alternative-X) is manufactured from the lung tissue of crack addicts.