Secondhand smoke during childhood may boost miscarriage risk


Although they had never been smokers themselves, women in the study who lived with two or more smokers as a child had a 20 percent higher risk of miscarriage, and those who were exposed to smoke five or more times per week had a 14 percent greater risk of losing a pregnancy, compared to women not exposed to secondhand smoke in childhood.

Nonsmokers who grew up with one smoker in the house, or were around smoke less than five times per week, didn't appear to have any change in their miscarriage risk.