Earlier quoted context omitted.
But surely no one has been saying that cannabis isn't a risk for pregnant women, let alone that it could be beneficial to smoke it, right?
Nearly 70% of dispensaries in Colorado recommended cannabis for morning sickness: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5970054/
Given the (bonkers IMHO) profit motive of the US medical industry, I suspect the latter, though I'd be interested to hear from those with experience.
[1] Given some of the stuff I've read online, I'm pretty sure they would prescribe cannabis for an ingrowing toenail if you asked.