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The risks of smoking, and of second-hand cigarette smoke, are well known. Around 82% of lung cancer deaths is caused by smoking, as is 30% of all cancer deaths, a quarter of all cases of heart disease and over 80% of deaths from smoking-related lung conditions like emphysema and bronchitis.

Migraine does not increase the risk for complications of pregnancy for the mother or the foetus.\n\nSeveral studies have shown a tendency for migraine to improve with pregnancy. Between 60 and 70 percent of women either go into remission or improve significantly, mainly during the second and third trimesters.

A drug that millions of pregnant women took decades ago to prevent miscarriage and complications has put their daughters at higher risk for breast cancer and other health problems that are showing up now, a new federal study finds.

Taking folic acid supplements before and during pregnancy was linked to a decreased risk of a having a child with a severe language delay at age 3, according to new research.