Causes of infertility

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Causes of infertility

Infertility is defined as the inability to conceive after a year of regular, unprotected sexual intercourse.
Traditionally women used to be alleged to be responsible for the issue. But nowadays nearly 90% of men, who come to Sanatorium Helios to undergo examinations do not meet the norm for sperm analysis according to the World Health Organisation. We recommend to seek expert help after 1 year of unprotected regular sex if the woman is under 35.
We advise women over 35 to meet a fertility specialist after 6 months. Regarding the fact that the question of infertility is very complex, we recommend you to come and consult your own individual case with our fertility experts.

The causes of infertility or reduced fertility are numerous, including those genetically given. Mostly they are potentiated by negative factors such as lifestyle and age. Weight (ideal BMI to conceive is between 20 and 25), smoking, alcohol, drugs, lack of exercise or excessive physical stress, and the increase in the incidence of sexually transmitted diseases are considered to be the most serious problems.

For women, the ideal age to conceive is between 23 and 32. Probability of getting pregnant at this time and under optimal conditions is about 25% each month. The probability decreases with age and only 5% of women conceive naturally over the age of 40. The reason behind is a higher number of cycles without ovulation and genetically defective eggs (degenerative eggs, which are not capable of fertilization).

Age does not play as essential role for men as it does for women, however, older men may have more problems with erection and ejaculation. Yet, it is alarming that over the past 50 years, sperm quality got worse by more than 100%.
As for women, smoking has an impact on the quality of eggs and reduces levels of estrogen. The toxic by-products of smoking negatively affect cells producing hormones. This causes menstrual cycle disorders, increases the number of cycles without ovulation and reduces the quality of eggs, which then can lead to poor quality embryos. As stated above, the chances of pregnancy are significantly reduced, and abortions in the early stages of pregnancy may occur more frequently.

Men - smokers often have a higher number of sperms with low motility. Such sperm cannot fertilize an egg, and if so, it may carry genetic defects that threaten the health of pregnancies and future children.
Sperm develops for about three months. Any man, who is with their partner planning to start a family, whether naturally or through IVF, should quit smoking, gain healthy weight, limit their exposure to stress, and add physical excercises.

Other factors that may affect fertility are exhaustion and stress. Short-term stress does not cause much harm, but long-term stress may lead to immune system disorders and total fatigue.
Body weight also plays quite a crucial role concerning fertility issues. Both extremes, either obesity or very low weight, lead to hormonal imbalances, which cause irregular menstrual cycles and ovulation disorders. Also, women, who dramatically and rapidly reduce their weight, might decrease their chances of getting pregnant. Hormones develop in adipose tissues and it is also a place where the hormones are bound. As for men, low weight is not as detrimental to their fertility. But obesity decreases testosterone levels, that may lead to libido losses.
Read more about female and male infertility, diagnosis in men and women, and how men and women aretreated with various fertility issues.

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602 00 Brno
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tel.: 00420 605 253 690
prim. MUDr. Pavel Texl
Head Team Physician and Managing Director
MUDr. Jakub Texl
MUDr. Zuzana Bílková
Jarmila Slámová
MUDr. Mojmír Fischer
RNDr. Katuše Gřegorčíková
Head of Medical Genetics Laboratory
RNDr. Kateřina Wagnerová
Head of Embryology Laboratory
MUDr. Veronika Kováčová
Dana Kochová
Main IVF Coordinator
MUDr. Alena Filková
RNDr. Iveta Valášková
Medical Genetics Laboratory Guarantor
MUDr. Ditta Leznarová
Clinical Geneticist
prof. MUDr. Jiří Šantavý, CSc.
Clinical Geneticist
Educational seminary



Educational seminary

On October, the 19th an educational seminary took place in the restaurant of Sanatorium Helios.
The topics were devoted to genetics and the genetic causes of infertility.


Why Sanatorium Helios


Infertility diagnosis

In most cases, the probable cause of infertility is discovered. Only about one fifth of them remain unexplained. However, even for these couples, the treatment or assisted reproduction can be successful.


Causes of infertility

The problem is often related to the woman. The truth is that 2/3 cases are caused by the male factor and less than a third by the female factor. In some cases, both partners participate in the couple's infertility, or it remains unresolved.


Genea (Sydney IVF)

In the Czech Republic, the treatment of infertility is associated with assisted reproduction at a level comparable to Western Europe. All centers of assisted reproduction in the Czech Republic have, or should have, an internationally recognized quality certification known as ISO 9001.


Assisted reproduction

If pregnancies do not take place even after eliminating causes, or in the cases of disorders, which cannot be solved in another way, your physician may suggest to you one of the assisted reproduction methods.


The Cryoembryo Transfer (KET)

Cryopreservation (freezing) is a safe method of keeping embryos in cryo containers with liquid nitrogen at −196 °C. Two basic methods of cryopreservation are generally used: slow cryopreservation and vitrification.

Partner center for assisted reproduction

Sydney IVF genea
Sanatórium Helios SK
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