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Description
The pharmacokinetics of nicotine has important implications for the proper use of tobacco cessation aids

Mukhopadhyay D, Nandi P, Varghese AC et al (2010) The in vitro effect of benzo[a]pyrene on human sperm hyperactivation and acrosome reaction

Klein et al., 2008)

It is difficult to define how long an abstinence is necessary to achieve this benefit, but it is estimated to be on the order of several months