We haven't found our child or children yet, but we do try to keep the possibility in mind when we're considering kids. If Mom has two children aged 8 and 10 it's different than if she has two aged 2 and 1.
We hadn't really thought about that possibility until we were presented with two boys who were 6 and 7 at one point. They had sibs that were 4, 2, and 1, that had been adopted by another family. Any family considering the 6 & 7 year old had been told that they would get first choice for the next baby (who was on the way), since the other adoptive family was not ready for more yet. The bio Mom and Dad had told CAS that they would keep having kids because they felt it was their Christian Duty, and they figured that eventually CAS would let them keep one

.