Semen characteristics of tobacco users in India.

Qualitative analysis of semen samples have been compared between 79 different types of tobacco addicts (smokers, chewers, and multiple addicts) with 21 nonaddicts (never consumed any form of tobacco). The percentage of motile sperm and total sperm count of the tobacco chewers are significantly low (p < .05). The frequency of abnormal sperm is also significantly high (p < .001) for smoking and multiple addict groups. Differential effects of smoking and chewing tobacco on sperm characteristics are discussed.