I smoked marijuana often until I found out I was. 19 weeks pregnant. I never stopped getting my period so I had no clue. My baby is healthy my dr. Says but will she be born with marijuana in her system? Ive tried to detox my body as much as possible buy eating healthy meals, no caffiene, lots of vitamins and exercise. I just don't want her to have Any problems. What are the long term effects if it's still in her system?