If you've never seen them, here are some studies that show adverse effects on infants during fetal development and even breastfeeding when the mother is the user:
Unfortunately, the article is not happy news for everyone, particularly the person who grows up suffering from any of the consequences mentioned. Here's just an excerpt or two:
There are mountains of scientific studies, Pogo. You just have to know where to find them if you really want to know what an enemy THC is to the developing human being, not to mention how it turns people depressed, anxious, and even bipolar behaviors in chronic users.
Life is hard on the body. THC is a terrible crazymaker to neural pathways in that body for reasons listed in those studies that track neurotransmitters.
Sorry.
The kicker to studying prenatal problems by maternal use is that researchers have a very, very difficult time trying to figure out what if any deleterious effects may be if the father is the user. You might as well try to pry a tooth from a diamond. Those kind of studies are hard to establish, and always have been.
Here's my take (and personal opinion) on this crap. I have smoked pot on several occasions when I was a kid. Didn't like it. When I left Vietnam, retrained and went to Germany, there were several times when I don't remember the previous couple of days - I drank myself into a stupor. One early morning, I woke up laying in a street in Heidleberg. I told myself then - this shit HAS to stop.
In the decades since that time, I have had a few beers (maybe 20). I don't drink, I don't smoke and I don't do drugs. My Wife and my kids and my Grand Kids have never seen me inebriated. Never once.
There are studies that claim that pot is harmless and there are studies that say that it will harm you over time. I don't know. Here's what I DO, however, know.
20-30 years from now, when these folks (primarily young people) are developing COPD, Lung Cancer, etc etc etc. It will be too late. The "Government" will begin printing labels on Pot cans telling us that "pot causes cancer" and "Nursing Mothers shouldn't smoke Marijuana" and so on and so forth. The States that "legalized" pot in spite of federal law will face BILLIONS in law suits. Finally, there will be settlements with the makers and sellers of "weed" and the American taxpayer will get not one penny, just like tobacco.
And then, just like with tobacco, we will start telling ourselves that "it won't happen to me" and 40 years after that, we will finally do away with this bullshit.