I have suffered from severe migraine headaches since I was 9 years old. When I got pregnant, I could no longer take the ibeprophen that I used to get rid of my headaches, and since I couldn't get rid of my headaches, I would just vomit for hours and hours on end, a couple times a week. My docter told me that it would be OK for me to smoke pot. He said that in fact marijuana does not have any effect on the fetus, except lethargy. He said that often, women who are high risk for miscarriage, are prescribed marijuana to keep the baby lethargic, and put less stress on the mothers' body.
My mother works in a hospital, and was absolutely livid when she found out I was smoking while I was pregnant. She discussed it with everyone at the hospital and found out that almost half the people she worked with smoked pot. She also learned that the pharmecutical companies are the ones in charge of what medical students learn in school. (since they are the biggest income for medicinal research.)
This was a big eye opening experience for my mother. I smoke pot. I used to be one of the kids that skipped school, and got in trouble. But it was not the pot. It was my problem with authority. Now, the people I smoke pot with are doctors, lawyers, and I even have a couple of friends on the local police force who fire one up with me now and again. They believe, that alcohol causes them way more problems, but their hands are tied, because drinking is legal, and pot is not.