If you smoke crack on a regular basis then the effects will stay with the child untill either a miscarridge or it is born. If the child does come out it and you still smoke then the baby will be need to be put on something to keep the cravings away. If you smoked crack once then the fetus will have it in its system between 3 days to 2 weeks depending on your usage.
you a food for doing it
Forever
3-5 days
It can stay there for up to 48-72 hours
3 and a half weeks
3 days
3days
7 days
About 3 months an pray their be no birth defect
It depends how long you smoked crack
Weed laced with crack presents you with two problems: weed stays around for up to a month, crack stays around for about a week.
too long buddy, your screwed if you have done crack. they will be able to tell you did that shitz for the next 50 years. Put down the pipe.