Caffeine is frequently used as a supplementtomany foodstuffs. We may often find it in many drinks such as "cola", energy drinks, coffee, tea, chocolate. It is very difficult to estimate the total day consumption of the caffeine, as it is hidden in many drinks and food. Pregnant women andfetuses aremoresubjected to the negativeeffectsof the caffeine, because of theextendedduration ofhigh concentrationsof this substancein their body.Future mothersshould not consume more than 300 mg of caffeinea day.It isclarified in the research whethercaffeine caninterferewith pregnancy, shorten its durationan dresult infetal defects. The analysis of available scientific literature on the effects of caffeine during pregnancy have been made to determine the relationship between caffeine intake and the difficulties of pregnancy, its risks and the impact on the health of the daily dose of caffeine.The studies have confirmedthe negativeeffects of caffeineon pregnancy andnewbornhealth. Embryotoxicity of caffeineduring pregnancy was provenat a dose ofmore than300mg a day. Also relationshipbetween the consumption ofcaffeine and the difficultiesofbecomingpregnant has been found.

Key words: caffeine, pregnancy, health.