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The production of sperm can be disrupted with a rise in temperature. [16] Thermal methods involve heating the testicles so that sperm production is slowed down. The spermatozoa are thus produced at a slightly lower temperature than that of the body, 1 to 2 °C below 37 °C. The cremaster muscle covers the testicles. It works involuntarily.
According to one lab test manual normal pH range is 7.2–8.2; [6] WHO criteria specify normal as 7.2–7.8. [5] Acidic ejaculate (lower pH value) may indicate one or both of the seminal vesicles are blocked. A basic ejaculate (higher pH value) may indicate an infection. [5]
The practice of tucking can reduce both the sperm count and sperm quality. [41] Meta-analysis indicates that mobile phone exposure affects sperm quality negatively. [42] Regarding diet, malnutrition or an unhealthy diet can lead to e.g. Zinc deficiency, lowering sperm quality. Sperm quality is better in the afternoon than in the morning. [43]
Hims reports that the respondents who used their phone more than 20 times per day had a 30% increased risk for lower sperm concentration and 21% increased risk for total sperm count to be below ...
Drugs can have various types of impact on the male body, side effects of medications may affect male fertility, spermatogenesis, and sexual function. Drugs can affect sperm parameters by inhibiting normal exocrine functions of the testes which can lead to a decrease in production of sperm, or by creating hormone imbalances. [4]
A 2012 paper published by French researchers and Yeshiva University's Institute for Public Health Sciences in the Journal of Human Reproduction studied French males from 1989 to 2005 and concluded that sperm counts and the proportion of normal, motile sperm fell by 32.2 and 8.1 percent, respectively. [26] [27]
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).
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