Just as a baseline, we know smoking cannabis is unsafe because it’s smoke going into your lungs. That’s never healthy. Any particulate inhalation is bad for your lungs.
I'm not saying it's safe to vape or eat cannabis when you're pregnant. But you if you say:
> you shouldn't consume cannabis when pregnant because bringing particles in your lungs is bad
then you open yourself up to the immediate response of:
> OK, so I can do edibles when I'm pregnant then, right?