Pregnancy is a unique period in a woman's life in which numerous physiological changes occur in all physiological systems, with these changes ensuring the normal growth and development of the fetus as well as preparing the mother for childbirth. The normal duration of pregnancy is 40 weeks, or otherwise 280 days, counting from the first day of the last menstrual cycle. Physiological changes during pregnancy affect the health of the oral cavity, so being aware of the expected physiological changes is necessary to provide quality dental care to pregnant women. The dentist has an important role in maintaining the oral health of pregnant women and informing them about the most common changes that occur in the oral cavity during pregnancy – such as gingivitis, periodontitis, epulis, caries, dental erosions, odontogenic diseases, ptialysm and increased tooth mobility. The consequences of not treating an oral infection during pregnancy outweigh the possible risks of using medication, so there is no justification for unnecessarily delaying dental procedures and treatment during pregnancy. Therapy of painful and inflammatory conditions to relieve pain and control infection is carried out regardless of the stage of pregnancy, elective procedures should be planned in the period from 14 to 34 weeks of pregnancy when these procedures are safest for both the mother and child, whereas the more complex prosthetic and aesthetic procedures should be postponed until after childbirth. Radiological diagnosis should be limited to emergency dental conditions, and only if such an examination really is necessary.