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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 ...
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It is advised to check the references for photos of reaction results. [1] Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2]
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 ...
When performing cryopreservation of semen, it is the sperm quality after reviving the sample that is of importance, because many sperm cells die in the process. To be of use in assisted reproductive technology , the sample should after thawing have more than 5 million motile sperm cells per ml with a good grade of mobility.
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The man then rubs his penis focusing on the glans. He ejaculates for the second round into the woman's mouth and onto her face while she lies on her back. Note that semen from two ejaculations differs. Semen from the former ejaculation is thicker and more in volume than semen from the latter.