This is in response to the first reply you recieved.
This person, though i'm sure she had good intentions, is coming from a fairly uneducated view point on pot smoking and its effects on unborn children.
All the things she listed that could go wrong with your baby are somewhat true, but only if you are smoking pot, while pregnant. The only negative effect pot is going to have on your boyfriend is lowering his sperm count, thc (the active chemical in pot) can take weeks to fully leave the system, so i'd give it about 4 weeks to flush out, and then one or two weeks more to get to the point that he's producing enough sperm.
Now be aware that pot is definitly a contributing factor to low sperm count, but he could have low sperm count for other biological reasons that aren't going to be solved by quitting pot. But laying off the smoke for a couple of weeks is worth a try.
My boyfriend and I were both pot smokers, (but both live very productive and positive lives), we work in the music business, and in that busniess, pot is a cultural norm. When we decided to try for a baby, I didn't get pregnant for almost a year, and then we decided to cut way back on pot smoking, he quit altogether and I quit for the most part (only smoking every once in a while, during the first two weeks of my cycle, before I could get pregnant and it have any significant effect on my unborn baby). As soon as we quit, I conceived. Our child is a beautiful, and intelligent 2 year old girl. We never smoke around her, or leave any clues that we smoke at all. Which is feel is very very important because I do have friends who were raised by "hippie" parents who would smoke pot in front of them and they all have pretty significant drug problems. I know now my parents smoked when I was young too, but they kept it hidden, andi never had a clue and never discovered drugs until I was way into my college career.
I wouldn't consider being a pot smoker the equivalent of being a drug addict, I dont' believe its even considred an addictive substance by science, anybody who has experienced it knows better than to say that. But I can see how someone on the outside would jump to the "drug addict" conclusion
so, I do agree a little bit with the fanatical replier above, being exposed to marijuana at a young age or knowing that your parents smoke it, makes a child far more likely to develop a drug habit later in life.
But this is your decision, not ours. And do please know that your boyfriend being a pot smoker is not going to make your child any less intelligent, pot does not change the genetic make up of sperm, and there for cannot have any biological effects on a child due to the father smoking pot. The complications arrise when the pregnant mother actively smokes pot, and i've read a couple of (scientific) articles questioning if that is even true. I'm not saying go smoke pot when pregnant, and I don't believe you suggested you even smoke, but just be aware.
Good luck!