Now that the first open-adoption generation is under way, social workers are becoming more aware of the role of siblings in these arrangements. An adoptive child’s relationships with biological siblings need to be taken into account. And two children adopted into the same family may have different degrees of openness with their birth mothers. Openness may also affect decisions about family size.
In all adoption searches, it is uncommon to find both the birth mother and father at the same time. A separate search, if desired, can be done afterwards for the father. Since males seldom change their surnames, and the mother might have additional information, it is usually easier than the initial search for the birth mother. In many cases, adoptees are able to do this second search for their birth father by themselves (or they try before paying for assistance).