Ok so forgive in advance, because in quire minds want to know...........I know there are situations, like someone I know who recent suffered some heart problems, and because they were adopted during the time of closed adoptions, they could not trace family medical history, and that is often time very important. Now, if you are talking about reunification of some sort, then no, often time it is not possible, and in fact, harmful underscoring why the adoption was best. It can also make a difference in how you "treat' the adoption with the child. Do you hide it completely? do you use it as a weapon, i.e., "we took you in...." kind of thing. Is that child aloving part of your family, but also being honest about the adoption? It is a very thin line you have to balance. I happen to thinkthat my parents and family did a great job with both adopted and foster children.
I also know that in foster care that the children struggle, and even into adulthood maintain those abanadonment issues. Sometimes we cann't keep them from some hurts, but we can extend God's love to them and do the best we can.