Male infertility

Women infertility is not always the reason for the sterile marriage. Circa in 30-40% childlessness is caused by women infertility, in other 30-40% of cases biological cause of infertility lies in a man. In 15-20% both partners are infertile, in other 5-10% it is impossible to define the infertility cause.

The most widespread cause of male infertility is a low quality of semen. There are also many other reasons. Opposite to female infertility, problems with male’s fertility decrease with age. As a rule, bad quality of semen is a consequence of the following reasons. Male’s infertility can also be genetic.

Among low quality semen there are: azoospermia, asthenozoospermia, oligospermia, and teratozoospermia.

Azoospermia – absence of semen in the semen fluid. Azoospermia can be connected with the blockade of seminiferous ways. Both can be caused by birth defects.

Asthenozoospermia – the decrease of active sperm. Only active sperm can fertilize an egg cell, when there is minority of such sperm – chance for pregnancy decreases.

The decrease of sperm in ejaculate is called oligospermia. Normal quantity of semen/ml – is more than 20 mln.

Decrease of this index below norm is called teratozoospermia.


Here are the reasons for insufficient quantity of semen:

  • Mumps disease in childhood;
  • Cryptorchism;
  • Diabetes;
  • Operated tumors;
  • Genetic causes;
  • Stress;
  • Infections;
  • Factors determined by environment;
  • Drugs and alcohol abuse.


There are also genetic factors of male infertility:

  • Chromosome mutation;
  • Micro division in Y chromosome;
  • Congenital absence of the vas deferens (CBAVD)