@Article{, title={Effect of Smoking during Pregnancy on Birth Weight, Placental Weight, and Time of Third Stage of Labor}, author={Tariq A. Al‑Shemmeri}, journal={Medical Journal of Babylon مجلة بابل الطبية}, volume={15}, number={4}, pages={381-384}, year={2018}, abstract={Background: Cigarette smoking of the mother during pregnancy is a well‑known cause associated with adverse reproductive outcomes, includingincrease in the incidence of placenta previa, abruption‑placentae, and double the risk of infant mortality from all causes. Objective: This studyaims to demonstrate the effect of smoking, whether active or passive, on the newborn body weight, placental weight, and the time of the thirdstage of labor. Materials and Methods: This prospective study involves sixty patients, their ages range between 20 and 32 years, all of themunderwent vaginal deliveries, and the lowest accepted packed cell volume (PCV) was 32%. The participants were classified into four groups:active smokers, passive smokers, mixed smokers, and the rest who are nonsmokers, representing the control group. The following data werecollected from every: age, gravidity and parity, and number of cigarettes per day, and for each female, the newborn body weight, placentalweight, the time of the third stage of labor, and PCV of the mother were estimated. Results: Among these sixty patients who involved in thestudy, 3% were active smokers, 31% were passive smokers, 27% were mixed smokers, and 39% were nonsmokers; the mean newborn bodyweight of nonsmokers (control group) was 3252 g; active smokers, 2430 g; passive smokers, 2819 g; and mixed smokers, 2407 g. The meanplacental weight in nonsmokers was 527 g; active smokers, 640 g; passive smokers, 551 g; and mixed smokers, 599 g. The time of the third stageof labor in nonsmokers was 6.9 min; active smokers, 12 min; passive smokers, 5.8 min; and mixed smokers, 6.6 min. Conclusions: Cigarettesmoking by pregnant women leads to a low birth weight and larger placenta and may interfere with the time of the third stage of labor.

} }