According to the World Health Organization, addiction is a psychological and sometimesphysical condition that occurs in interaction between a living organism and addictivesubstances. It is characterized by behavior and other mental processes that always involve theneed for occasional or regular use of addictive substances in order to experience its effect onmental processes or to avoid discomfort due to the absence of such substances. Most types ofaddictions share two common aspects: psychological addiction and physical addiction. Thereare several types of addictions: addiction to psychoactive substances, alcohol addiction,smoking addiction and many other addictions. The use of alcohol, nicotine and drug duringpregnancy is associated with the risk of congenital abnormalities and functional disorders orimmunosuppression. Taking alcohol during pregnancy usually leads to fetal alcoholsyndrome. Smoking during pregnancy results in recurrent pregnancy loss, low birth-weight innewborns and perinatal mortality, congenital malformations may also occur. The consumptionof heroin during pregnancy causes low birth-weight in newborns, newborn asphyxia,increased incidence of pregnancy losses and sudden infant death syndrome. Mothers thatsuffer from addiction breastfeed less, but it is necessary to consult with a doctor aboutpossible harmful consequences. Pregnant addicts often show concern for the consequencesthat drug abuse might have on the child, numerous studies suggest that they reduce the dose ofdrugs during pregnancy, but they do not always go into full abstinence. Healthcare treatmentof addicted woman has specific characteristics, in particular due to the typical personalitytraits: low self-esteem and self-confidence, numerous social, family and interpersonalproblems, lower ability to adjust and frequent depression and anxiety. Pregnant addicts do notvisit a gynecologist regularly during their pregnancy, they usually live in poor hygienic,epidemiological and socioeconomic conditions and therefore every mother addict pregnancyis considered high-risk pregnancy.