Differences between sterility and infertility

Sterility and infertility are two terms that, although often used interchangeably in everyday language, actually have different and specific meanings in the context of reproductive health. Understanding the difference between sterility and infertility is essential to properly address fertility problems and seek the most suitable treatment.

When is sterility considered?

Sterility refers to the inability to achieve pregnancy after one year of regular sexual intercourse without any contraceptive methods. In these cases, medical evaluation is essential to identify the possible causes and treatment options.

When is infertility considered?

Infertility refers to the difficulty in achieving a ‘progressive pregnancy’ after one year of attempting regular unprotected sexual intercourse.

It is important to understand these differences in order to properly address fertility issues and seek appropriate treatment.

In addition, sterility or infertility can be primary, which is when pregnancy has never been achieved before, and secondary infertility, which is when pregnancy and childbirth have been achieved before.

Types of sterility and infertility

Both sterility and infertility can be:

Primary, when pregnancy has never been achieved before.
Secondary, when pregnancy and childbirth have occurred in the past, but it is not possible to conceive again.

Why wait a year before seeking help?

It is known that 80–85% of couples achieve pregnancy within a year, and 93% within two years. This is why the one-year recommendation is based on statistical probabilities.

However, in certain cases, it is advisable to start a study earlier (after 6 months):

Women over the age of 37
Gynecological diseases such as endometriosis or chronic anovulation
Family history of early menopause or gynecological cancer
Male urological problems suggesting infertility

The most common causes of sterility and infertility

There are several causes that can contribute to both sterility and infertility:

In women: hormonal imbalances, ovulation disorders, endometriosis, or blocked fallopian tubes. Stress, age, and lifestyle can also play a role.
In men: genetic or anatomical factors, infections, endocrine problems, or low sperm quality.

In a considerable percentage of cases, no clear cause is found, leading to a diagnosis of sterility and infertility of unknown origin.

How are sterility and infertility diagnosed?

The diagnosis of sterility and infertility requires a comprehensive study of both partners. For women, evaluations may include hormonal analyses, ultrasounds to assess ovarian reserve, and tests to check the fallopian tubes and uterus. For men, a semen analysis is the most common first step, allowing specialists to evaluate sperm count, mobility, and morphology. In some cases, more advanced genetic or hormonal tests may be necessary.

What treatments are available?

Fortunately, medical advances have made it possible to treat many cases of sterility and infertility successfully. Depending on the cause, options may include:

Ovulation induction with medication.
Intrauterine insemination (IUI), which introduces prepared sperm directly into the uterus.
In vitro fertilisation (IVF), one of the most effective treatments when other approaches are not successful.
ICSI (Intracytoplasmic Sperm Injection), used when there are severe male factor problems.
Egg or sperm donation, when gametes from the couple are not viable.

Each case requires an individualised approach, and the choice of treatment will depend on age, medical history, and the underlying cause.

Can sterility and infertility be prevented?

Although not all causes can be avoided, maintaining a healthy lifestyle can reduce risks. Avoiding smoking, excessive alcohol, obesity, and high stress levels is beneficial for reproductive health. Regular check-ups also help detect gynecological or urological problems early, improving treatment outcomes.

Emotional support is essential

Couples facing sterility and infertility often experience stress, anxiety, and frustration. Psychological support, either individually or as a couple, can be very helpful in coping with the emotional burden of treatment. At URE Centro Gutenberg, we emphasise both medical and emotional care to accompany patients throughout the process.

Knowing the differences between sterility and infertility helps patients approach their reproductive journey with clearer expectations. At URE Centro Gutenberg, we evaluate each situation individually to offer the best options for achieving pregnancy.

Do you have any other questions?