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They're also incredibly addictive and, when one's habit stretches out over decades, ruinous to an individual's health

Search methods A literature search was performed of all relevant information related to tobacco smoking, its effect on human sperm parameters, and its role as a mutagen

It can be a small hole or a deeper cut

Women who were using cannabis at 15 weeks gave birth to shorter babies with smaller head circumferences, who tended to be born earlier

Oxidation and the spermatozoa

Model 3: adjusted for age, sex, alcohol drinking (heavy), income (low), exercise (regular), body mass index, hypertension, dyslipidemia, and weight change