According to research done by the American Fertility Facilities, marijuana smoke can increase sperm count in certain men while cigarette smoke can decrease sperm count in all men. also, I am a devout Rastafarian, and for as long as I can remember, I have sat around with my pregnant family members and friends to participate in a very very important ritual in which mothers join together and religiously smoke marijuana with each other. This practice is hundreds of years old and the incidence of birth defects or learning disabilities has never been present. Marijuana is natural and many Rasta women smoke it to become closer to not only Jah but their baby as well. Marijuana helps many pregnant women fight nausea, loss of appetite, stress and pregnancy related pain. There has also NEVER been a study on marijuana-smoking pregnant women that concludes that marijuana causes birth defects or learning disabilities in the fetus. Everything is fine in moderation. do your research b4 you judge.