[Influence of smoking on pregnancy]

Smoking is a significant factor which affects not only reproduction and the process of pregnancy but also the offspring. Endangering for tobacco smoke and nicotine either passive or active has an important influence for shortening the time of pregnancy, the weight of the newborn and the Placenta. The occurrence of complications connected with smoking is probably correlated with the amount of cigarettes smoked per day.

The target of the paper was to analyse the influence of passive and active smoking on the course of pregnancy.

The study involved a group of 113 women who gave birth in Gynaecological and Obstetrics Clinical Hospital of the Karol's Marcinkowski University of Medical Sciences in Poznan during the period from January to June 2011. Based on data gained from documentation and mothers three groups were separated: 22 women who were active smokers, 32 passive smokers and 59 women from control group who have never been smoking. There were analyzed selected obstetric data and term of pregnancy, condition and weight of newborn, blood pH and alkaline balance from umbilical vessels.

in research there were no correlation between groups and/ or results of researches of blood Ph, alkaline balance from umbilical vessels and the assessment of the newborn in Apgar score at 1, 3, 5 minute. In fact passive smoking women were younger (the average 27,84) than actively smoking woman (30,23) and non-smokers (30,25) (p=0,03). The most of small as for their gestational age infants were in the group of active smoking women (14%). Non-smokers more often did have a miscarriage (84%) in the past than other groups (active smokers 60%, passive 33%) (p=0,04).

smoking women usually come from countryside or small towns, they were not marriage and they had preterm delivery. In this group there was found the biggest percent of too small newborns for their gestational age - 14%.