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Such a smoking pattern has historically been more common among racial and ethnic minorities who nevertheless have high rates of smoking-related morbidity and mortality. The researchers said their study mostly included whites, so it may not reflect the bigger risks among African-Americans

These results are in accordance with our previous study showing that smoking negatively alters the sperm standard parameters, DNA stability of sperm, and the ratio of protamine mRNA as well as downregulates the expression of H2BFWT, PRM1, and PRM2 36

Unlike cigarettes, cigars generally do not contain additional chemicals or flavorings