Search results
Results From The WOW.Com Content Network
A routine semen analysis should include: physical characteristics of semen (color, odor, pH, viscosity and liquefaction), volume, concentration, morphology and sperm motility and progression. To provide a correct result it is necessary to perform at least two, preferably three, separate seminal analyses with an interval between them of seven ...
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 ...
The volume of the semen sample (must be more than 1.5 ml), approximate number of total sperm cells, sperm motility/forward progression, and % of sperm with normal morphology are measured. It is possible to have hyperspermia (high volume more than 6 ml) or Hypospermia (low volume less than 0.5 ml).
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
Higher repeatability: Since sperm count, morphology and motility of semen samples fluctuate within a short period of time, results of analysis are less repeatable. SCSA has a repeatability of 0.98-0.99 in clinical settings. Unless disruption is made by different lifestyles or medical intervention, experimental results are reproducible. [9] [4] [13]
If an analysis of semen quality is required, this technique is generally not recommended as part of the ejaculation could be lost which decreases the accuracy of the results. [6] [8] Surgical extraction, if for example a blockage in the vas deferens is suspected to impede fertility, semen can be taken directly from the epididymis.
How long the man has abstained prior to providing a semen sample correlates with the results of semen analysis and also with success rates in assisted reproductive technology (ART). Both a too short period of time since last ejaculation and a too long one reduce semen quality. A period of time of less than one day reduces sperm count by at ...
However, treatments are available for individuals experiencing pain/discomfort, fertility problems, [14] "symptoms of low testosterone levels", and unusual results from semen analysis. [15] Treatments include medication to address pain, surgery (microscopic and laparoscopic varicocelectomy), and embolization. [ 14 ]