I'm glad I don't smoke.

http://www.acsh.org/healthissues/newsID.646/healthissue_detail.asp

"Cigarette smoking significantly alters concentrations of the sex hormone testosterone, growth hormone, and other hormones in men. Male cigarette smokers have less testosterone than do male nonsmokers. Men with low testosterone concentrations have a lower sex drive and lower sperm counts than do those with normal or high concentrations of the hormone."

"In one large study, researchers found that ectopic pregnancy—extra-uterine implantation and development of a fertilized ovum—is 2-4 times likelier among women who smoke cigarettes than among those who do not smoke. The fallopian tubes are the most common sites of ectopic pregnancy. If it is not detected early, ectopic pregnancy can result in fallopian-tube rupture and even death"

"Of the approximately 140,000 cases of miscarriage per year in the United States, approximately 19,000 have been attributed to cigarette smoking."

 

"Evidence from numerous studies suggests that cigarette smoking adversely affects the immune system. Some scientists have speculated that such changes may result in infertility through an increase in the frequency of fallopian-tube infection."

Gross. Hm, I think I read somewhere before that tobacco lowered estrogen levels and increased menstrual irregularity too. As if menstruation isn't annoying enough as it is. haha.