A recent study found that 60% of 400 medical marijuana dispensaries in Colorado recommend cannabis as a safe and effective treatment for morning sickness. Despite this, physicians are still out on the matter and aren't sure if cannabis use is safe for pregnant women.

While research suggests that cannabis can be used to treat nausea, some doctors say that there isn't enough evidennce to make a definitive claim just yet. Physicians like Dr. Mickye Adams of the Sutter Pacific Medical Foundation are stressing that the affects of cannabis use on the fetus is still largely unknown.

"We don't know whether it's effective for nausea and vomiting and we don't know whether it's safe," Dr. Adams told abc7. "If marijuana is relatively safe and if it is effective than it may be a useful medicine. We don't know. We ought to have done that work by now."

Excessive cannabis use has also be linked to hyper-vomiting, which would only further exacerbate the problem. As Adams says, preventing excessive vomiting in pregnant women is of the utmost importance.

"Hyperemesis gravidarum, which is the medical condition for severe nausea and vomiting, is very serious and can require hospitalization and can be a big deal."

Dale Sky Jones of Oaksterdam University, who educates cannabis industry professionals, says she would encourage dispensary workers to steer pregnant women away from cannabis use.

"I wouldn't recommend a budtender to tell a pregnant woman to consume cannabis."

But, she also understands that expecting mothers have to weigh the risks for themselves, and ultimately make their own decisions on how to deal with their symptoms.

"Often times, moms find that after trying everything else, the only thing that helps with the vomiting and the nausea is cannabis," she said.