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  • laboratory
  • Ideally each laboratory should set its own normal values reflecting the specific population analyzed, but this is practically limited by the availability of semen from proven fertile men who have recently achieved a pregnancy. (gfmer.ch)
  • 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)
  • oligospermia
  • Ejaculatory duct obstruction may result in a complete lack of semen (aspermia) or a very low-volume semen (oligospermia) which may contain only the secretion of accessory prostate glands downstream to the orifice of the ejaculatory ducts. (wikipedia.org)
  • urethra
  • The semen is ejected through the urethra with rhythmic contractions. (wikipedia.org)
  • After the start of orgasm, pulses of semen begin to flow from the urethra, reach a peak discharge and then diminish in flow. (wikipedia.org)
  • volume
  • Abnormalities of semen volume and liquidity, and sperm number and morphologydecrease fertility. (faqs.org)
  • They will suffer from a very low volume of semen which lacks the gel-like fluid of the seminal vesicles or from no semen at all while they are able to have the sensation of an orgasm during which they will have involuntary contractions of the pelvic musculature. (wikipedia.org)
  • In contrast, if both vasa deferentia are obstructed (which may be the result of intended sterilization), a semen analysis will also reveal aspermia/azoospermia, but an almost normal volume of the semen, since the efflux of the seminal vesicles is not hindered. (wikipedia.org)
  • fluid
  • The normal pH of vaginal fluid is between 3.8 and 4.5, whereas male semen is typically between 7.2 and 8.0 (a neutral substance has a pH of 7.0). (wikipedia.org)
  • examination
  • The availability of semen renders possible direct examination of male germ cells, giving precious data that are not accessible for female germ cells. (gfmer.ch)
  • fertilization
  • Semen, like many other body fluids, hasa standard pH range that would be considered optimal for fertilization of the egg to take place. (faqs.org)
  • Semen quality is a measure of the ability of semen to accomplish fertilization. (wikipedia.org)
  • counts
  • A minimum of two semen analyses provided several weeks apart, and collected in a similar manner, is recommended because sperm counts tend to fluctuate. (malereproduction.com)
  • A 2017 review and meta-analysis found sperm counts among Western men (i.e. men in Australia, Europe, New Zealand, and North America) declined 50-60% between 1973 and 2011, with an average decline of 1.4% per year. (wikipedia.org)
  • quality
  • The characteristics measured by semen analysis are only some of the factors in semen quality. (wikipedia.org)
  • It is the sperm in the semen that are of importance, and therefore semen quality involves both sperm quantity and quality. (wikipedia.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)
  • As men age there is a consistent decline in semen quality, and this decline appears to be due to DNA damage. (wikipedia.org)
  • vaginal
  • Introducing semen into the vaginal cavity during the ovulation time, called 'timing of intercourse' or 'timing of artificial insemination', is important for achieving a pregnancy. (wikipedia.org)
  • Various devices may be used including: A conception cap can assist to protect semen from the vaginal cavity and allow semen to pool against the cervical os. (wikipedia.org)
  • available
  • Around the time of ovulation, a conception cap or cervical cap is filled with semen and placed on a woman's cervical os for several hours to maximize the time the semen is available to fertilise a waiting egg. (wikipedia.org)
  • present
  • For clarity, I will present three critical frames for future reference, two of which I will repeatedly be referring to as Zoom1 and Zoom3 (Zoom 2 is an intermediate zoom between Zoom1 and Zoom3, which offers no real benefit regarding the objective of this analysis). (blogspot.com)
  • possible
  • This device is growing in popularity because its use ensures that the donor's semen is deposited as close as possible to the cervix, and it can be kept there while the woman goes about her normal activities for several hours to aid conception. (wikipedia.org)