If a woman smokes marijuana once while 4months pregnant how much of an effect it can have on the unborn baby

Only once? Not much of an effect.

The best thing for her to do would be for her to consider that the life she's carrying is more important than her need to get high.

It's a plant. I wouldn't see the harm but of course it healthier to not smoke anything or do any type of drugs. My first son I was 16 when I got pregnant, didn't know I was pregnant until I was aroung 6 months closer to 7 months and I smoked pot every day, of course stopped as soon as I found out, was blessed with a healthy 8 and a half pound baby boy. Something's are just not worth it.. Kids are not replaceable.

Its a plant. i wouldnt see the harm

It causes low birth weight, premature delivery, asthma... shall I go on? What is your medical education?

I said it was of course heathier not to smoke. My medical education? I didn't think I had to be a nurse or doctor to give my opinion on here..? All I said was I didn't see any harm it was she asked, I was going off my own personal experience from when I was pregnant.

I said it was of course heathier not to smoke. My medical education? I didnt think I had to be a nurse or doctor to give my opinion on here..?? All I said was I didnt see any harm it was she asked, I was going off of my own personal experience from when I was pregnant.

I don't want to jump in to start a fight or beat a dead horse, but I have to add...
You don't have to have a medical degree to give an opinion. However, you have to be careful when discussing medical topics. Opinions could easily be confused for "advice". Especially when the topic is concerning pregnancy and illicit drug use; it's a very sensitive subject.