Earlier quoted context omitted.
I think the real problem- and something I'm hoping more research can help with- is that marijuana is a medicine for a lot of people. It prevents seizures, reduces or stops migraines, and (this one is really important considering the context) reduces nausea. Sometimes people have to balance between a bunch of crappy options. This isn't always the case, of course, but it's hard to judge what someone is going through fr…
A lot of medications need to be discontinued during pregnancy. All of the women I know who are bipolar absolutely do not want to become pregnant because they would need to stop taking all of their medication.
A lot of this comes down to balancing risks- which is absolutely something that should be done while consulting a doctor. If someone is so nauseous they can't even maintain weight, let alone gain that healthy baby weight, then it's possible a small amount of marijuana may be more healthy for them despite the risks.
To be clear though I'm just advocating a lot more research on the subject, and personally would err on the side of caution when it comes to things that aren't heavily researched.