Congratulations on your friend being preg. I pray for a healthy baby. Don't know much about UAs for pregnant women; I hope your friend has taken a hiatus from weed smoking until delivery. We're just about mid Dec. and if her UA will be in Jan. that gives her a lot of time to clean out with proper diet and some exercise. But I fully suggest she discuss this with her Ob/Gyn since preg women are a whole different catagory.