In industrialized countries, fertility has decreased in recent years to the lowest levels on record. The identification of modifiable factors that influence human fertility, such as diet, is of great clinical relevance.

Infertility is defined as the inability to conceive after a year of having regular unprotected sex with the same partner. Approximately 10-17% of couples experience primary or secondary infertility at some point in their reproductive life.

Micronutrient status is a modifiable risk factor that can have an impact on fertility, since vitamins and minerals play an important role in the physiological processes involved.