I'm not sure the point of this post.

Are you having a drug test, or prenatal care?

prenatal care doesn't do drug screens, they just do the scans needed- Test your blood for abnormalities and things that can hurt the baby.

My wife is 7 months along, and a daily smoker (no long term or short term effects on the fetus) but it does help indubitably with nausea If your just trying to get clean for a job - Then you might want to sub.