Washington: Women who smoke during pregnancy increase the risk of both obesity and gestational diabetes, in their daughters, a recent study has found.The study is by Dr Kristina Mattsson, Lund University, Sweden, and colleagues including Dr Matthew Longnecker from the National Institute on Environmental Health Sciences at the U.S.National Institutes of Health, North Carolina, USA.While the relation of prenatal tobacco exposure to negative outcomes in childhood has been much studied, reports on possible adverse effects that persist until adulthood are more scarce and results are inconsistent.In the study using data from the Swedish Medical Birth Register, the authors investigated the relationship between a woman smoking in pregnancy and the chances of her daughter then developing gestational diabetes and obesity.Data were retrieved from the Medical Birth Register of Sweden for women who were born in 1982 (when smoking data were first registered) or later and who had given birth to at least one child; 80,189 pregnancies were included. The data on maternal smoking behaviour in the register are categorised into three categories: non-smokers, moderate smokers (1-9 cigarettes/day) and heavy smokers ( greater than 9 cigarettes/day).
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