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  2. Sperm motility - Wikipedia

    en.wikipedia.org/wiki/Sperm_motility

    Sperm motility is dependent on several metabolic pathways and regulatory mechanisms. The axonemal bend movement is based on the active sliding of axonemal doublet microtubules by the molecular motor dynein, which is divided into an outer and an inner arm. Outer and inner arm plays different roles in the production and regulation of flagellar motility: the outer arm increase the bea

  3. Decapacitation factor - Wikipedia

    en.wikipedia.org/wiki/Decapacitation_factor

    Decapacitation is a reversible process that converts fertile, capacitated sperm to less-fertile uncapacitated sperm. [2] [3] This activity is achieved by interaction between cholesterol, phospholipids and fibronectin-like substances and delivered via small vesicles in seminal plasma. DF prevents onset of capacitation.

  4. Semen analysis - Wikipedia

    en.wikipedia.org/wiki/Semen_analysis

    Total motile spermatozoa (TMS) [25] or total motile sperm count (TMSC) [26] is a combination of sperm count, motility and volume, measuring how many million sperm cells in an entire ejaculate are motile. Use of approximately 20 million sperm of motility grade c or d in ICI, and 5 million ones in IUI may be an approximate recommendation.

  5. Male infertility - Wikipedia

    en.wikipedia.org/wiki/Male_infertility

    Males from India had a 30.3% decline in sperm count, 22.9% decline in sperm motility, and a 51% decrease in morphology over a span of a decade. Doctors in India disclosed that the sperm count of a fertile Indian male had decreased by a third over a span of three decades. [82]

  6. Semen quality - Wikipedia

    en.wikipedia.org/wiki/Semen_quality

    Collecting the sperm at home gives a higher sperm concentration, sperm count and motility, particularly if the sperm is collected via sexual intercourse. [35] If the semen sample is to be collected by masturbation, a specimen from the early stages of the ejaculate should be into a clean, unused, sealed collection cup.

  7. Semen - Wikipedia

    en.wikipedia.org/wiki/Semen

    A 1992 World Health Organization report described normal human semen as having a volume of 2 mL or greater, pH of 7.2 to 8.0, sperm concentration of 20×10 6 spermatozoa/mL or more, sperm count of 40×10 6 spermatozoa per ejaculate or more, and motility of 50% or more with forward progression (categories a and b) of 25% or more with rapid ...

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  9. Capacitation - Wikipedia

    en.wikipedia.org/wiki/Capacitation

    Capacitation has two effects: destabilisation of the acrosomal sperm head membrane which allows it to penetrate the outer layer of the egg, and chemical changes in the tail that allow a greater mobility in the sperm. [3] The changes are facilitated by the removal of sterols (e.g. cholesterol) and non-covalently bound epididymal/seminal ...