How long will thc be in inborn baby's umbilical cord after one hit of marijuana?

Impossible to say: but your real question would seem to me to involve some drug testing of your newborn baby, and your use of marijuana sometime prior to the baby's birth, and I am more concerned about whether you have a problem that is going to effect your ability to be an effective and caring mother than I would be about getting "caught." Talk to a counselor or your primary care physician asap. Good luck.

Not where I look: If you are a suspected user in my state, I am required to investigate. Although blood and urine can show drug traces from recent use, the first stools are more revealing.The meconium, which begins to form after 12 weeks into the pregnancy will hold trace evidence of any drug exposure for months.You are better of never taking a hit, and or never coming under suspicion.