It depends. My baby died at 8 weeks and I found out at 12 weeks through an ultrasound, and it was removed by D&C
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.
it can stay fresh for 2 weeks
they can stay good for about 4 weeks.
perms can stay in from 3-6 weeks
a few weeks
In humans 9 months. Other animals have different gestation periods. Gestation is the period of time that the fetus spends growing inside its mother's uterus. The gestation period for humans is approximately 40 weeks long.
A kitten should stay with its mother for a minimum of eight weeks and preferably 12 weeks.
3 weeks
10 weeks
2 weeks
A couple weeks
6 weeks