Women who smoked during two consecutive pregnancies had a 35-percent higher risk of delivering a stillborn baby than those who didn't smoke at all or only smoked during their first pregnancy, according to Swedish researchers. 

Reuters reported June 27 that researchers from the Karolinska Institute in Stockhold also found that women who smoked 10 or more cigarettes daily had a 45-percent higher risk of stillbirth if they smoked during both pregnancies.

The study was published in the June 2007 issue of BJOG: An International Journal of Obstetrics and Gynecology.