Idk but I feel like smoking weed atkeast at a certain time won’t do nothing to the baby … I’m pregnant now with my third baby and I’ve been smoking for years … my first and second babies I stopped smoking weed till I was about to turn 4 months and is for the simple fact that it was really helping with my pain and nausea that I was having . And I will also be a blunt every morning only … so I won’t recommend to smoke till birth but I would atkeast in my opinion smoke till before your baby start growing their lungs .