Thanks so much for the info. And the compliments. I feel iam the lucky one because my daughter is the greatest gift i could have got
I hope your sister realizes how lucky she is to have you in her life. Unfortunately any thing she used after the 20th week of pregnancy will show up in baby's meconium if the test it after delivery. My guess is that with her history they might want to. What they will do with that information is up to you and the picture that is presented. Should you want to adopt this child as well, you may be able to make the case for it. I am truly sorry that you are in this situation, but those kids are lucky to have you.
I do believe that they can test the baby back to 20 weeks. Maybe she should get fixed if she can't handle staying away from crack for her children. Or maybe by one less rock and buy a condom.