The ideal way to improve the effects of smoking on male fertility is to quit smoking as soon as possible
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We included studies in this meta-analysis that: (1) assessed gray matter using structural MRI, (2) reported a set of coordinates (i.e., foci) from a between-subjects contrast comparing smokers to matched nonsmoking participants, (3) reported coordinates in a defined stereotaxic space (i.e., Talairach or Montreal Neurological Institute [MNI]), (4) performed a whole-brain analysis, and (5) provided sufficient information regarding characterization of smoking behaviors (e.g., pack-years, Fagerstrm Test of Nicotine Dependence [FTND] scores, years smoking, number of cigarettes smoked per day), basic demographics of the study samples (e.g., age, sex, N ), and data analysis strategies (e.g., smoothing parameters, statistical thresholds)

Participants who took the smoking cessation medication varenicline (marketed as Chantix) for four weeks prior to trying to quit smoking were more likely to successfully quit smoking than those who took varenicline for just one week before quittingthe current standard therapy for the drug
You can find out about the health risks of other tobacco products on the NHS website