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Smoking Hits Sons' Fertility

By Kellie Heywood

Mothers have long been advised to quit smoking during pregnancy for the health of their babies. Now research has suggested that wanting grandchildren may be another good reason to give up.

Dr Cecilia Ramlau-Hansen and colleagues from Aarhus University Hospital in Denmark investigated semen quality in 347, 18- to 21-year-olds born to mothers who had participated in a 1980's study on their health habits during pregnancy. They found that sons of mothers who smoked during pregnancy have lower total sperm counts than men whose mothers did not smoke.

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