• Abnormalities
  • In humans, chromosomal abnormalities arising from incorrect spermatogenesis results in congenital defects and abnormal birth defects (Down Syndrome, Klinefelter's Syndrome) and in most cases, spontaneous abortion of the developing foetus. (wikipedia.org)
  • Variations
  • Variations in semen quality among individual boars have been reported during storage after cooling 11 and after freezing, 12 and better storage performance after cooling has been described in semen from crossbred males. (aasv.org)
  • We acknowledge that difficult-to-control confounding factors in the highly variable nature of semen, selection criteria, and comparability of populations from different time periods in secular-trend studies, the quality of laboratory methods for counting sperm, and apparently geographic variations in semen quality are the main issues that complicate the interpretation of the available evidence. (hindawi.com)
  • temperature
  • Timing is not as critical for the postvasectomy test but the semen must be kept at body temperature. (faqs.org)
  • The optimal temperature of the testes for sperm production is slightly lower than body temperature, which is why the testes hang away from the body in the scrotum. (peacehealth.org)
  • characteristics
  • Selection of boars by freezability of semen eliminates the influence of individual boars on characteristics of frozen-thawed semen. (aasv.org)
  • In men, CD can reduce semen quality and cause immature secondary sex characteristics, hypogonadism and hyperprolactinaemia, which causes impotence and loss of libido. (wikipedia.org)
  • Results
  • The lack of agreement in results obtained by several authors has not clarified the influence of centrifugation method on the quality of frozen boar semen. (aasv.org)
  • A delayed diagnosis, coupled with poorly defined disease categories, results in sub-optimal treatment regimens. (clinicaltrials.gov)
  • An illness that results in a high fever can cause abnormal sperm production, as well as spending a lot of time in hot tubs, wearing tight underwear, or holding a laptop. (storkotc.com)
  • males
  • 16 These individual effects justify the use of selected males for semen freezing. (aasv.org)
  • The aim of this study was to analyse the influence of centrifugation regime and shape of the centrifugation tube on the quality of frozen-thawed semen, and to determine differences among individual Ibérico x Landrace males, a breed not previously studied. (aasv.org)
  • concentration
  • Conclusions This large prospective study of semen quality among young men of the general population showed an increasing trend in sperm concentration and total sperm count. (bmj.com)
  • Such a chip may measure the concentration of sperm in a semen sample against a control liquid filled with polystyrene beads. (wikipedia.org)
  • Test
  • Semen freezability of all boars had been previously assessed by the osmotic resistance test (ORT) performed on fresh semen, 17 and qualified as good. (aasv.org)
  • At the laboratory level this is rare, as most healthcare providers will not test the semen and sperm unless specifically requested or there is a strong suspicion of a pathology in one of these areas discovered during the medical history or during the physical examination. (wikipedia.org)
  • Cervical cancer screening, such as with the Papanicolaou test (pap) or looking at the cervix after using acetic acid, can detect early cancer or abnormal cells that may develop into cancer. (wikipedia.org)
  • Methods
  • Different methods used for semen collection are masturbation, condom collection and epididymal extraction, etc. (wikipedia.org)
  • biological
  • It should have 20X and 40X lens, with Hoffman optics, and a 37 °C surface to have an optimal maintenance of the biological material. (wikipedia.org)
  • different
  • A total of 30 ejaculates from five Ibérico x Landrace boars were studied in order to establish the effect of different centrifugation conditions on semen quality after refrigeration and freezing. (aasv.org)
  • Several techniques are currently utilised for this purpose, each of them relying on different features in order to select the optimal sperm. (weebly.com)
  • Outcome
  • T he outcome of the freezing and thawing process for boar semen depends in part on whether dialysis 1 or centrifugation 2 is employed to separate seminal plasma. (aasv.org)
  • studies
  • In addition to the signs of acute hepatitis, people can also demonstrate signs of coagulopathy (abnormal coagulation studies with easy bruising and bleeding) and encephalopathy (confusion, disorientation, and sleepiness). (wikipedia.org)
  • health
  • The authors therefore initiated a study to assess reproductive health in men from the general population and to monitor changes in semen quality over time. (bmj.com)
  • specifically
  • The couple should be asked specifically about their sexual habits, including their level of knowledge of the optimal timing of intercourse and the use of potentially spermatocytes and lubricants. (punchng.com)
  • actually
  • While it requires only one sperm to fertilise the ovum, the odds of conception are such that it takes millions of sperm per milliliter of semen to actually achieve the goal of fertilisation. (punchng.com)