I have seen several kids born to people that used pot during pregnacny and their kids are fine. I'm also doing my research paper on the two sides to the story. There have been countless studies that show no negative effects. In some test children of pot smokers did better on reflex test, cognitive test, psycomotor skills, and showed to be a joy to care givers. The choice is up to the pregnant woman and what benefits her and the baby. Marijuana does help with morning sickness, to increase your appeitite, pregnancy migraines and depression (both pre and post natal)