Anecdotal report: When my wife was pregnant with our daughter last year, she suffered from hyperemesis gravitas, which means she had morning sickness that didn't quit, 24 hours a day for almost her entire pregnancy. Her OB/GYN out here in our small town is a part of a doctor group based out of Denver, which made us happy because we had braced ourselves for finding a doctor that was also a cattle veterinarian or something, lol.
But anyway, her doctor was practically trying to convince her to smoke cannabis to combat the nausea! My wife kept saying that she had stopped smoking once she got pregnant, and her doctor was basically saying, "Okay, but you don't have to. Please feel free to smoke some cannabis as I think that will help you."
It pretty much blew my mind. I don't think doctors in Florida would have been so encouraging in that manner. I'm so glad we moved!
(All of this to say that I think the science is changing, and medical professionals, especially in places like CO, are adjusting their methods and recommendations accordingly.)