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Prerequisites and causes

Prerequisites for reproduction

In general, the causes of involuntary childlessness can be found in equal measure in the man and the woman. However, to increase the chances of successful treatment, the woman is in most cases also treated even if the man alone has reproductive problems. We will therefore briefly describe the most important stages of pregnancy. This portrayal is aimed at making it easier for you to understand the subsequent steps for diagnosis and the treatment options.

Female reproduction         Male reproduction           Causes of infertility

The most important stages for a pregnancy

Ovulation: During ovulation, the mature follicle bursts and releases an egg that is ready for fertilisation. This egg, which can survive for 24 hours, then moves through the fallopian tubes into the uterus.
Fertilisation: Fertilisation occurs when a sperm cell penetrates the egg through the embryonic membrane. The genetic material of the man and the woman then merges. The ideal window for fertilisation starts two days before ovulation and ends on the day of ovulation. A woman is in her fertile phase between the 9th and 16th day of her menstrual cycle.
Implantation: If the embryo settles in the endometrium (the mucous lining of the uterus), we speak of implantation. Initially the yellow bodies and then later the placenta produces the hormone progesterone, which is important for sustaining the pregnancy.

Hormonal imbalances

Hormonal imbalances in the woman can affect her ability to become pregnant and carry a pregnancy to term in a many different ways. This type of fertility problem can often be solved through hormone therapy, so that it becomes possible for her to fall pregnant naturally. Through an individualised hormone analysis in our laboratories, we determine your hormonal situation and advise you of your chances of a natural pregnancy after hormonal treatment.

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Endometriosis is a benign, chronic condition affecting 7-15% of all women of reproductive age. This is when endometrial cells settle outside the uterine cavity on the organs of the abdomen. The adhesion or scarring of the tissue can make transportation of the sperm and implantation of a fertilised egg difficult and is therefore one of the most common causes of infertility. Our doctors will advise you in detail about endometriosis as a cause of sterility and about treatment options. 

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The most common causes of infertility (sterility)

In approximately 30% of cases of involuntary childlessness, the causes lie with the woman:

  • The age of the woman: from the age of 35, the ability to reproduce decreases
  • Abnormalities or injuries in the fallopian tubes, ovaries or uterus
  • Blocked fallopian tubes
  • Endometriosis
  • Myomas (benign tumours of the uterus)
  • Immunological abnormalities

In a further 30%, the causes lie with the man:

  • Dysfunction in sperm maturation
  • Blockage in the seminal ducts
  • Ejaculation problems or erectile dysfunction
  • Prostate disorders
  • Stress, environmental toxins, infections

In 20% of childless couples, the causes lie with both partners; in another 20%, the reason for childlessness cannot be clearly determined.

We are here for you!


Please feel free to contact us!

Opening times:
Mo-Sa: 8.00 - 16.00

Telephone consultation:
Tu: 16.00 - 20.00
Su: 8.00-15.00 (call: +45 78 74 63 19)

Schedule an appointment:
✉ aarhus[at]vivaneo.dk
☎ +45 (0)78 75 54 77

We look forward to hearing from you!