Male Infertility Clinical Trial
Official title:
Correlation Between the Level of Vitamin D and Semen Parameters
- Infertility is defined as the inability of a sexually active couple to conceive after 1
year of regular intercourse without contraception, affects approximately 15% of couples,
and male factors are the cause in 20% -50% of cases.
- Infertility of unknown origin is classified into idiopathic male infertility and
unexplained male infertility according to semen quality.
-Idiopathic male infertility is known as idiopathic oligoasthenoteratozoospermia, which
indicates that the men have an unexplained reduction of semen quality.
In contrast, unexplained male infertility is defined as infertility of unknown origin with
normal sperm parameters.
Furthermore, optimal strategies for treating idiopathic male infertility have also remained
unclear.
- Data from studies in humans suggest that vitamin D receptors are present in testis,
epididymis, prostate and seminal vesicles. The level of expression varies, being higher
in epididymis and seminal vesicles.
- Vitamin D receptors expression was also evident in Leydig cells, as well as in normal
and abnormal sperm, with the acrosomal region and the neck being the sites with the most
abundant messenger ribonucleic acid expression.
- The 1,25(OH)2 D3 molecule increases intracellular calcium concentrations, sperm motility
and acrosin activity, and reduces triglyceride content in sperm, actions that
significantly contribute to fertilising capacity within the female reproductive tract.
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