WordNet

a lash-like appendage used for locomotion (e.g., in sperm cells and some bacteria and protozoa)
the male reproductive cell; the male gamete; "a sperm is mostly a nucleus surrounded by little other cellular material" (同)sperm_cell, spermatozoon, spermatozoan

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1. 卵細胞質内精子注入法 intracytoplasmic sperm injection
2. 男性不妊症の治療 treatment of male infertility
3. 処置済み精液を用いた子宮内授精（IUI）のための手順 procedure for intrauterine insemination iui using processed sperm
4. 男性不妊症の評価 evaluation of male infertility
5. 男性避妊のための精管切除およびその他の精管閉鎖法 vasectomy and other vasal occlusion techniques for male contraception

Octylphenol induces changes in glycosylation pattern, calcium level and ultrastructure of bank vole spermatozoa in vitro.

Kotula-Balak M1, Tworzydlo W2, Pochec E3, Zarzycka M4, Bilinska B4.
Toxicology in vitro : an international journal published in association with BIBRA.Toxicol In Vitro.2015 Apr;29(3):529-37. doi: 10.1016/j.tiv.2014.12.013. Epub 2014 Dec 29.
Our previous studies revealed that in bank vole testicular cells octylphenol (OP) action is related either to its binding to estrogen receptors or increasing cAMP level that modulates spermatozoa motility and acrosome reaction (AR), (Kotula-Balak et al., 2011, 2014). To better understand the mechani
PMID 25553917

Germ-cell hub position in a heteropteran testis correlates with the sequence and location of spermatogenesis and production of elaborate sperm bundles.

Ott GJ1, Shirkey NJ, Haimo LT, Cardullo RA, Thaler CD.
Molecular reproduction and development.Mol Reprod Dev.2015 Mar 3. doi: 10.1002/mrd.22469. [Epub ahead of print]
In insects, spermatogonial cells undergo several mitotic divisions with incomplete cytokinesis, and then proceed through meiosis and spermatogenesis in synchrony. The cells derived from a single spermatogonial cell are referred to as a cyst. In the water strider Aquarius remigis, spermiogenesis occu
PMID 25735541

Light microscopy morphological characteristics of the sperm flagellum may be related to axonemal abnormalities.

Mitchell V1, Sigala J, Ballot C, Jumeau F, Barbotin AL, Duhamel A, Rives N, Rigot JM, Escalier D, Peers MC.
Andrologia.Andrologia.2015 Mar;47(2):214-20. doi: 10.1111/and.12249. Epub 2014 Feb 24.
Although electron microscopy provides a detailed analysis of ultrastructural abnormalities, this technique is not available in all laboratories. We sought to determine whether certain characteristics of the flagellum as assessed by light microscopy were related to axonemal abnormalities. Forty-one p
PMID 24611953

Localization of Tektin 1 at Both Acrosome and Flagella of Mouse and Bull Spermatozoa

Roles of Intracellular Cyclic AMP Signal Transduction in the Capacitation and Subsequent Hyperactivation of Mouse and Boar Spermatozoa

HARAYAMA Hiroshi
Journal of Reproduction and Development 59(5), 421-430, 2013
… Meanwhile, hyperactivation and the acrosome reaction are essential to sperm fertilization with oocytes and are apparently triggered by a sufficient increase of intracellular Ca2+ in the sperm flagellum and head, respectively. …
NAID 130003381850