I can't answer positively for the baby, but I'm ALMOST positive it lasts the same as the mother. THC sticks to fat cells, so it takes much longer to pass than anything else. It can take 4-6 weeks if you use regularly, and longer for the more fat you have on you. It takes 3-7 days or longer if you use it infrequently.
Meth is detectable in the blood up to 3 days.
Cocaine stays in unborn child how long
It is usually lasts until 12 hours
Average length of time is 30-45 days but can stay in the system up to 90 days in chronic users.
I agree with Krystald30. 30 to 45 days and maybe more. By you being pregnant, it definitely stays longer because it's going through the baby too. You must quit at least until the baby it out. You can get into lots of trouble with your baby being positive for THC. If it's too much, the hospital can call child services and you will go through it with the law. DHS or those other services like that can be a problem for you and the family. Please stop if you can. It's very important that you do. No one really likes dealing with the law.
Every drug is different as far as length of time it stays in the bloodstream. Most drugs are detectable in blood 12-72 hours.. Some are even longer than that.
THC is detectable in the blood 2–3 days after infrequent use, up to 2 weeks after frequent use.