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What determines male infertility?

letto 6353 volte | autore: Claudio Manna, ginecologo specialista in fecondazione assistita (vai al curriculum)


Male fertility depends on: an adequate production of spermatozoa by the testicles (spermatogenesis), on the free circulation of seminal liquid in the male reproductive organs, on an adequate deposit of spermatozoa inside the woman’s vagina.

Normal seminal liquid has the following characteristics:

  • volume : 2-5 ml
  • number : 50-180 million spermatozoa/ml
  • mobility: 80% on emission, 60% after 4 hours
  • morfology: 60-80% with a normal form
  • pH: 7.6-8.2
  • fructose: >1g/l

When these parameters are altered various conditions are present :

  • Oligospermia : reduction of the total number of spermatozoa,
  • Oligoasthenospermia : reducton of the number and the mobility of the spermatozoa
  • Oligoasthenoteratospermia : reduction of the number, mobility and the presence of  abnormally shaped spermatozoa
  • Azoospermia : total absence of spermatozoa from the semen

Abnormalities regarding the deposit of sperm in the vagina result from: surgery of the bladder neck or of the prostrate (retrograde ejaculation), prostatectomy (removal of the prostrate) hypospadia, premature ejaculation, impotence, anatomical abnormalities of the female genitals

The factors of male infertility are:

  • Varicocele, damage to the veins of the spermatic funiculi that causes the reduction of spermatozoa production.
  • Hormonal deficit: at the level of the hypophysis  causing an alteration of spermatogenesis
  • Infections: of the prostate, the testicles (orchitis) caused by differing pathogens, especially of the sexually transmitted kind.
  • Immunologic: auto immune response
  • Genetic: damage of the chromosomes (micro deletion of the Y), syndromes of genetic origin (Klinefelter syndrome) cystic fibrosis.
  • Obstructive from acquired or congenital pathologies

Disclaimer: the information provided on this site is designed to support, not replace, the relationship that exists between a patient/site visitor and his/her existing physician.

giovedģ 20 marzo 2008

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