•Available data indicate that up to 13% of infertility may be attributable to cigarette smoking.
•Smoking appears to accelerate the loss of reproductive function and may advance the time of menopause by 1 to 4 years.
•Evidence indicates that semen parameters and results of sperm function tests are 22% poorer in smokers than in nonsmokers and the effects are dose-dependent, but smoking has not yet been conclusively shown to reduce male fertility.
•Smoking is associated with increased risks of spontaneous abortion and ectopic pregnancy.
•Gamete mutagenesis is one possible mechanism whereby smoking may adversely affect fecundity and reproductive performance.
•Smokers require nearly twice the number of IVF attempts to conceive as nonsmokers.
•Nonsmokers with excessive exposure to tobacco smoke may have reproductive consequences as great as those observed in smokers.
•Cessation of smoking can be facilitated by providing education, monitoring, and consistent individualized support.
Source - https://www.asrm.org/FullAccess/