Snuff In 2005, a team of researchers from the Autonomous University of Barcelona (UAB) concluded that smoking during pregnancy increases the risk of childhood leukemia. The study was published in the Journal of the American Medical Association.

The investigation showed that carcinogens in snuff products can cross the placenta and directly affect fetal genetic material, causing injury associated with various types of childhood leukemia. The results were obtained from follow-up of 50 women undergoing prenatal diagnosis and conducting 800 interviews.

After analysis, we found that the fetuses of smoking mothers showed a significant increase in chromosome abnormalities compared to those of nonsmokers.